tree.json

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                    "34-在排序数组中查找元素的第一个和最后一个位置": {
                      "node_id": "algorithm-8c477af729de472582bdbe59ce542725",
                      "keywords": [
                        "leetcode",
                        "在排序数组中查找元素的第一个和最后一个位置"
                      ],
                      "children": []
                    }
                  },
                  {
                    "48-旋转图像": {
                      "node_id": "algorithm-1acfcc250aac4aa5a8f9c6d9bd3e52d2",
                      "keywords": [
                        "leetcode",
                        "旋转图像"
                      ],
                      "children": []
                    }
                  },
                  {
                    "1-两数之和": {
                      "node_id": "algorithm-07b8a7ed904c43ecb56a64ad88ea6552",
                      "keywords": [
                        "leetcode",
                        "两数之和"
                      ],
                      "children": []
                    }
                  },
                  {
                    "54-螺旋矩阵": {
                      "node_id": "algorithm-a2d7a543b3544612b2ded810e038ae29",
                      "keywords": [
                        "leetcode",
                        "螺旋矩阵"
                      ],
                      "children": []
                    }
                  },
                  {
                    "80-删除有序数组中的重复项 II": {
                      "node_id": "algorithm-16f4937169b5456484ee30f6feac1d4c",
                      "keywords": [
                        "leetcode",
                        "删除有序数组中的重复项 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "56-合并区间": {
                      "node_id": "algorithm-1cf93cdce7c74a59a3e9747d9db9cd03",
                      "keywords": [
                        "leetcode",
                        "合并区间"
                      ],
                      "children": []
                    }
                  },
                  {
                    "73-矩阵置零": {
                      "node_id": "algorithm-5cf5a41da0224dd4899c2ba710ef63be",
                      "keywords": [
                        "leetcode",
                        "矩阵置零"
                      ],
                      "children": []
                    }
                  },
                  {
                    "74-搜索二维矩阵": {
                      "node_id": "algorithm-d4bfa7763d0945db8aeebb37428c8836",
                      "keywords": [
                        "leetcode",
                        "搜索二维矩阵"
                      ],
                      "children": []
                    }
                  },
                  {
                    "35-搜索插入位置": {
                      "node_id": "algorithm-3cc342d468d746c78d79cca20abcf2d3",
                      "keywords": [
                        "leetcode",
                        "搜索插入位置"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-链表": {
                "node_id": "algorithm-b161fe5fe94b40ab987a6de00b476269",
                "keywords": [],
                "children": [
                  {
                    "82-删除排序链表中的重复元素 II": {
                      "node_id": "algorithm-233b68b5a0654725a2202b7afd803489",
                      "keywords": [
                        "leetcode",
                        "删除排序链表中的重复元素 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "19-删除链表的倒数第 N 个结点": {
                      "node_id": "algorithm-51547bc1c76e4f548089b42e54fefd63",
                      "keywords": [
                        "leetcode",
                        "删除链表的倒数第 N 个结点"
                      ],
                      "children": []
                    }
                  },
                  {
                    "83-删除排序链表中的重复元素": {
                      "node_id": "algorithm-2e5fd5ab03aa4374a7c34e7607e6b0bd",
                      "keywords": [
                        "leetcode",
                        "删除排序链表中的重复元素"
                      ],
                      "children": []
                    }
                  },
                  {
                    "25-K 个一组翻转链表": {
                      "node_id": "algorithm-54ac2af686104c6fbb580175e89017cd",
                      "keywords": [
                        "leetcode",
                        "K 个一组翻转链表"
                      ],
                      "children": []
                    }
                  },
                  {
                    "86-分隔链表": {
                      "node_id": "algorithm-05a778f9b25848e5aeb66c6cb6ac6ee4",
                      "keywords": [
                        "leetcode",
                        "分隔链表"
                      ],
                      "children": []
                    }
                  },
                  {
                    "23-合并K个升序链表": {
                      "node_id": "algorithm-af001dbe7eb0462597b4a5fd86aab504",
                      "keywords": [
                        "leetcode",
                        "合并K个升序链表"
                      ],
                      "children": []
                    }
                  },
                  {
                    "92-反转链表 II": {
                      "node_id": "algorithm-83905ab3dc2d48c9ad6caa8a60e82b21",
                      "keywords": [
                        "leetcode",
                        "反转链表 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "2-两数相加": {
                      "node_id": "algorithm-ad6de4c8735b4a8b8ae89cf9ed0e59bb",
                      "keywords": [
                        "leetcode",
                        "两数相加"
                      ],
                      "children": []
                    }
                  },
                  {
                    "24-两两交换链表中的节点": {
                      "node_id": "algorithm-03249b7fafaa44b397e0420c4ef851d8",
                      "keywords": [
                        "leetcode",
                        "两两交换链表中的节点"
                      ],
                      "children": []
                    }
                  },
                  {
                    "21-合并两个有序链表": {
                      "node_id": "algorithm-8e3730b2552e438683edd17ea8e6d0bd",
                      "keywords": [
                        "leetcode",
                        "合并两个有序链表"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-字符串": {
                "node_id": "algorithm-44c71bcea6bc43c9a49daa534cc02fc1",
                "keywords": [],
                "children": [
                  {
                    "58-最后一个单词的长度": {
                      "node_id": "algorithm-a6c2cff8feb34579bfac99c6a4fbcea8",
                      "keywords": [
                        "leetcode",
                        "最后一个单词的长度"
                      ],
                      "children": []
                    }
                  },
                  {
                    "93-复原 IP 地址": {
                      "node_id": "algorithm-d1118330f5ab4f72bebb952130b4c984",
                      "keywords": [
                        "leetcode",
                        "复原 IP 地址"
                      ],
                      "children": []
                    }
                  },
                  {
                    "8-字符串转换整数 (atoi)": {
                      "node_id": "algorithm-78d7f93b73ab455a936beee192435764",
                      "keywords": [
                        "leetcode",
                        "字符串转换整数 (atoi)"
                      ],
                      "children": []
                    }
                  },
                  {
                    "38-外观数列": {
                      "node_id": "algorithm-36472d67e3f8470f9a4736a61be405ed",
                      "keywords": [
                        "leetcode",
                        "外观数列"
                      ],
                      "children": []
                    }
                  },
                  {
                    "3-无重复字符的最长子串": {
                      "node_id": "algorithm-38aa7e68723b4032826cf9161a6d807d",
                      "keywords": [
                        "leetcode",
                        "无重复字符的最长子串"
                      ],
                      "children": []
                    }
                  },
                  {
                    "6-Z 字形变换": {
                      "node_id": "algorithm-377db31810a14cffb4c9aaa62042fc10",
                      "keywords": [
                        "leetcode",
                        "Z 字形变换"
                      ],
                      "children": []
                    }
                  },
                  {
                    "14-最长公共前缀": {
                      "node_id": "algorithm-72092f29e27a4ebbb7bde80c5ad29df0",
                      "keywords": [
                        "leetcode",
                        "最长公共前缀"
                      ],
                      "children": []
                    }
                  },
                  {
                    "43-字符串相乘": {
                      "node_id": "algorithm-06c58aa2c0b24bd78ee07d91df71a06c",
                      "keywords": [
                        "leetcode",
                        "字符串相乘"
                      ],
                      "children": []
                    }
                  },
                  {
                    "65-有效数字": {
                      "node_id": "algorithm-5a293b8a3a8c4256902089b4016692dc",
                      "keywords": [
                        "leetcode",
                        "有效数字"
                      ],
                      "children": []
                    }
                  },
                  {
                    "28-实现 strStr()": {
                      "node_id": "algorithm-33e31f6fa4634b9484d47e99f16cfbff",
                      "keywords": [
                        "leetcode",
                        "实现 strStr()"
                      ],
                      "children": []
                    }
                  },
                  {
                    "97-交错字符串": {
                      "node_id": "algorithm-54af19c37be946428a9fb4d22130f476",
                      "keywords": [
                        "leetcode",
                        "交错字符串"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-栈与队列": {
                "node_id": "algorithm-a4544af1d3484210abb1a1200c9aefdc",
                "keywords": [],
                "children": [
                  {
                    "227-基本计算器 II": {
                      "node_id": "algorithm-c75a176a776a4b2d87cf2be7102b49b7",
                      "keywords": [
                        "leetcode",
                        "基本计算器 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "71-简化路径": {
                      "node_id": "algorithm-4d089e1f1bbb4ef39287be26d217f812",
                      "keywords": [
                        "leetcode",
                        "简化路径"
                      ],
                      "children": []
                    }
                  },
                  {
                    "20-有效的括号": {
                      "node_id": "algorithm-c73d3d24a60f420f82ac494f0904e98f",
                      "keywords": [
                        "leetcode",
                        "有效的括号"
                      ],
                      "children": []
                    }
                  },
                  {
                    "224-基本计算器": {
                      "node_id": "algorithm-56c34a1192d0451cb982e456a82c5c6d",
                      "keywords": [
                        "leetcode",
                        "基本计算器"
                      ],
                      "children": []
                    }
                  },
                  {
                    "32-最长有效括号": {
                      "node_id": "algorithm-8be2b66ea1a5469286bfd4b607ffc30a",
                      "keywords": [
                        "leetcode",
                        "最长有效括号"
                      ],
                      "children": []
                    }
                  },
                  {
                    "155-最小栈": {
                      "node_id": "algorithm-e390d7a141d94907930a50469baa0cfa",
                      "keywords": [
                        "leetcode",
                        "最小栈"
                      ],
                      "children": []
                    }
                  },
                  {
                    "218-天际线问题": {
                      "node_id": "algorithm-23bec6ccffe24729b4891bac639f0870",
                      "keywords": [
                        "leetcode",
                        "天际线问题"
                      ],
                      "children": []
                    }
                  },
                  {
                    "84-柱状图中最大的矩形": {
                      "node_id": "algorithm-07ceef4bf79f48f5a290825aeba16d9a",
                      "keywords": [
                        "leetcode",
                        "柱状图中最大的矩形"
                      ],
                      "children": []
                    }
                  },
                  {
                    "150-逆波兰表达式求值": {
                      "node_id": "algorithm-765b0266150f4d7ea3f93ec89248bb36",
                      "keywords": [
                        "leetcode",
                        "逆波兰表达式求值"
                      ],
                      "children": []
                    }
                  },
                  {
                    "42-接雨水": {
                      "node_id": "algorithm-d2c352294a324cde87f077cf1c3fc0f4",
                      "keywords": [
                        "leetcode",
                        "接雨水"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-排序算法": {
                "node_id": "algorithm-23e9e4c3b7a147299c16ebd6d25dd23b",
                "keywords": [],
                "children": [
                  {
                    "493-翻转对": {
                      "node_id": "algorithm-3a4e0f87183b4a27b08de2624304ca54",
                      "keywords": [
                        "leetcode",
                        "翻转对"
                      ],
                      "children": []
                    }
                  },
                  {
                    "324-摆动排序 II": {
                      "node_id": "algorithm-e519f2364bbf42c1ba847fa47c745de6",
                      "keywords": [
                        "leetcode",
                        "摆动排序 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "274-H 指数": {
                      "node_id": "algorithm-9e8294b8930c462fb54eba9c47a8ecfd",
                      "keywords": [
                        "leetcode",
                        "H 指数"
                      ],
                      "children": []
                    }
                  },
                  {
                    "347-前 K 个高频元素": {
                      "node_id": "algorithm-04c75a4fe3714e1385bf72d429f8264d",
                      "keywords": [
                        "leetcode",
                        "前 K 个高频元素"
                      ],
                      "children": []
                    }
                  },
                  {
                    "354-俄罗斯套娃信封问题": {
                      "node_id": "algorithm-f221f99db10a4f6387f4414b485c3ec4",
                      "keywords": [
                        "leetcode",
                        "俄罗斯套娃信封问题"
                      ],
                      "children": []
                    }
                  },
                  {
                    "164-最大间距": {
                      "node_id": "algorithm-e7fb5d6455fe490dbffe4b5cac8a5b95",
                      "keywords": [
                        "leetcode",
                        "最大间距"
                      ],
                      "children": []
                    }
                  },
                  {
                    "327-区间和的个数": {
                      "node_id": "algorithm-56f49e9431934f4ab2e3b09586675d3c",
                      "keywords": [
                        "leetcode",
                        "区间和的个数"
                      ],
                      "children": []
                    }
                  },
                  {
                    "912-排序数组": {
                      "node_id": "algorithm-1b8fb429d0f242cb991e78bb19cfda1f",
                      "keywords": [
                        "leetcode",
                        "排序数组"
                      ],
                      "children": []
                    }
                  },
                  {
                    "315-计算右侧小于当前元素的个数": {
                      "node_id": "algorithm-4b5f859d4b83448e81381353bc1eba4c",
                      "keywords": [
                        "leetcode",
                        "计算右侧小于当前元素的个数"
                      ],
                      "children": []
                    }
                  },
                  {
                    "378-有序矩阵中第 K 小的元素": {
                      "node_id": "algorithm-6008013f4b44488584935091ecb34fec",
                      "keywords": [
                        "leetcode",
                        "有序矩阵中第 K 小的元素"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-双指针": {
                "node_id": "algorithm-d02251b3c0c5437b98141c97f2663f83",
                "keywords": [],
                "children": [
                  {
                    "75-颜色分类": {
                      "node_id": "algorithm-d81595f7151443d48a988e70e6efb62b",
                      "keywords": [
                        "leetcode",
                        "颜色分类"
                      ],
                      "children": []
                    }
                  },
                  {
                    "11-盛最多水的容器": {
                      "node_id": "algorithm-c2c888a4936d4a829ee95e51151a7df2",
                      "keywords": [
                        "leetcode",
                        "盛最多水的容器"
                      ],
                      "children": []
                    }
                  },
                  {
                    "31-下一个排列": {
                      "node_id": "algorithm-5460e4499c4b486b8d3d420337a4e95c",
                      "keywords": [
                        "leetcode",
                        "下一个排列"
                      ],
                      "children": []
                    }
                  },
                  {
                    "142-环形链表 II": {
                      "node_id": "algorithm-dc2fe764852f445ea4f7393548a21e83",
                      "keywords": [
                        "leetcode",
                        "环形链表 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "141-环形链表": {
                      "node_id": "algorithm-b36465af5596480baf353689bbb76872",
                      "keywords": [
                        "leetcode",
                        "环形链表"
                      ],
                      "children": []
                    }
                  },
                  {
                    "61-旋转链表": {
                      "node_id": "algorithm-ed4faf635e83447691ebbb5489a80619",
                      "keywords": [
                        "leetcode",
                        "旋转链表"
                      ],
                      "children": []
                    }
                  },
                  {
                    "26-删除有序数组中的重复项": {
                      "node_id": "algorithm-c2fdb51c5a0648e5a2583ec52225e85f",
                      "keywords": [
                        "leetcode",
                        "删除有序数组中的重复项"
                      ],
                      "children": []
                    }
                  },
                  {
                    "27-移除元素": {
                      "node_id": "algorithm-19baa04e7c604f0da6b99a51f548d860",
                      "keywords": [
                        "leetcode",
                        "移除元素"
                      ],
                      "children": []
                    }
                  },
                  {
                    "88-合并两个有序数组": {
                      "node_id": "algorithm-7ef31e89b32342ff9dd569f71ad8493c",
                      "keywords": [
                        "leetcode",
                        "合并两个有序数组"
                      ],
                      "children": []
                    }
                  },
                  {
                    "16-最接近的三数之和": {
                      "node_id": "algorithm-cb9503bb2fff401d9bc50547f91c9882",
                      "keywords": [
                        "leetcode",
                        "最接近的三数之和"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            }
          ]
        }
      },
      {
        "算法高阶": {
          "node_id": "algorithm-4d7a30ae9d034a938dd6fa3376fe1a51",
          "keywords": [],
          "children": [
            {
              "leetcode-树": {
                "node_id": "algorithm-4702bb6e19f84212bbe4bf42d15bf7cb",
                "keywords": [],
                "children": [
                  {
                    "95-不同的二叉搜索树 II": {
                      "node_id": "algorithm-92fd99738b8f4fbc9b9a9fdeeeadb93f",
                      "keywords": [
                        "leetcode",
                        "不同的二叉搜索树 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "100-相同的树": {
                      "node_id": "algorithm-4b31baa58e8f47179d61dc60aeeddf3f",
                      "keywords": [
                        "leetcode",
                        "相同的树"
                      ],
                      "children": []
                    }
                  },
                  {
                    "124-二叉树中的最大路径和": {
                      "node_id": "algorithm-771dcac3f8264cc49799e5b53d5f7ff5",
                      "keywords": [
                        "leetcode",
                        "二叉树中的最大路径和"
                      ],
                      "children": []
                    }
                  },
                  {
                    "98-验证二叉搜索树": {
                      "node_id": "algorithm-712807eb4c214bfca939d8411c8c4d87",
                      "keywords": [
                        "leetcode",
                        "验证二叉搜索树"
                      ],
                      "children": []
                    }
                  },
                  {
                    "96-不同的二叉搜索树": {
                      "node_id": "algorithm-38095f83157045a8a9461a9eb16f2485",
                      "keywords": [
                        "leetcode",
                        "不同的二叉搜索树"
                      ],
                      "children": []
                    }
                  },
                  {
                    "99-恢复二叉搜索树": {
                      "node_id": "algorithm-4c2a5b22d67c4455bf4524f938fba3b6",
                      "keywords": [
                        "leetcode",
                        "恢复二叉搜索树"
                      ],
                      "children": []
                    }
                  },
                  {
                    "94-二叉树的中序遍历": {
                      "node_id": "algorithm-28852b24083548cfa7d620b9991c5145",
                      "keywords": [
                        "leetcode",
                        "二叉树的中序遍历"
                      ],
                      "children": []
                    }
                  },
                  {
                    "101-对称二叉树": {
                      "node_id": "algorithm-587f3b68dc7047d5b2445cb0c5fc50c3",
                      "keywords": [
                        "leetcode",
                        "对称二叉树"
                      ],
                      "children": []
                    }
                  },
                  {
                    "102-二叉树的层序遍历": {
                      "node_id": "algorithm-894e8b4e12a64b228b73d75b3fe22817",
                      "keywords": [
                        "leetcode",
                        "二叉树的层序遍历"
                      ],
                      "children": []
                    }
                  },
                  {
                    "103-二叉树的锯齿形层序遍历": {
                      "node_id": "algorithm-1457c70ac29a46a795c3a8aa8de0d34f",
                      "keywords": [
                        "leetcode",
                        "二叉树的锯齿形层序遍历"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-哈希表": {
                "node_id": "algorithm-3a6e81c7539748218c0114758c053d8b",
                "keywords": [],
                "children": [
                  {
                    "30-串联所有单词的子串": {
                      "node_id": "algorithm-cbdd961fd6b9430c9d3750a9d9659cdb",
                      "keywords": [
                        "leetcode",
                        "串联所有单词的子串"
                      ],
                      "children": []
                    }
                  },
                  {
                    "205-同构字符串": {
                      "node_id": "algorithm-8b6209013d9e495d94c4643447f74475",
                      "keywords": [
                        "leetcode",
                        "同构字符串"
                      ],
                      "children": []
                    }
                  },
                  {
                    "36-有效的数独": {
                      "node_id": "algorithm-025fb8ec2ca945278ba5f2786336925c",
                      "keywords": [
                        "leetcode",
                        "有效的数独"
                      ],
                      "children": []
                    }
                  },
                  {
                    "41-缺失的第一个正数": {
                      "node_id": "algorithm-b93725c019b442d6a2e7ea0ba6abe784",
                      "keywords": [
                        "leetcode",
                        "缺失的第一个正数"
                      ],
                      "children": []
                    }
                  },
                  {
                    "76-最小覆盖子串": {
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                      "keywords": [
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                        "最小覆盖子串"
                      ],
                      "children": []
                    }
                  },
                  {
                    "49-字母异位词分组": {
                      "node_id": "algorithm-8cd8db97f6aa469cbad2d7fb4a5288e2",
                      "keywords": [
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                        "字母异位词分组"
                      ],
                      "children": []
                    }
                  },
                  {
                    "126-单词接龙 II": {
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                      "keywords": [
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                        "单词接龙 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "127-单词接龙": {
                      "node_id": "algorithm-6df957f509fc40d1ae8a9736bd2401dc",
                      "keywords": [
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                        "单词接龙"
                      ],
                      "children": []
                    }
                  },
                  {
                    "128-最长连续序列": {
                      "node_id": "algorithm-78586cd84fd946a3ab3df877877a7a70",
                      "keywords": [
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                        "最长连续序列"
                      ],
                      "children": []
                    }
                  },
                  {
                    "166-分数到小数": {
                      "node_id": "algorithm-602c74771c664b6798149723fa790697",
                      "keywords": [
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                        "分数到小数"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-图与搜索": {
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                "keywords": [],
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                    "77-组合": {
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                        "组合"
                      ],
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                    }
                  },
                  {
                    "133-克隆图": {
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                      "keywords": [
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                        "克隆图"
                      ],
                      "children": []
                    }
                  },
                  {
                    "332-重新安排行程": {
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                      "keywords": [
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                        "重新安排行程"
                      ],
                      "children": []
                    }
                  },
                  {
                    "207-课程表": {
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                      "keywords": [
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                        "课程表"
                      ],
                      "children": []
                    }
                  },
                  {
                    "329-矩阵中的最长递增路径": {
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                      "keywords": [
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                        "矩阵中的最长递增路径"
                      ],
                      "children": []
                    }
                  },
                  {
                    "210-课程表 II": {
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                      "keywords": [
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                        "课程表 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "79-单词搜索": {
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                      "keywords": [
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                        "单词搜索"
                      ],
                      "children": []
                    }
                  },
                  {
                    "112-路径总和": {
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                      "keywords": [
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                        "路径总和"
                      ],
                      "children": []
                    }
                  },
                  {
                    "113-路径总和 II": {
                      "node_id": "algorithm-32f257cc9a114a4cb092581b3a017d74",
                      "keywords": [
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                        "路径总和 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "130-被围绕的区域": {
                      "node_id": "algorithm-d221fe9f0a114efdbd615b8cba03e7fc",
                      "keywords": [
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                        "被围绕的区域"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-数学": {
                "node_id": "algorithm-cd2045704d6e4a2e9de341f7566bec74",
                "keywords": [],
                "children": [
                  {
                    "29-两数相除": {
                      "node_id": "algorithm-a1305e0a920647b0a74d80f6ee5d7bf9",
                      "keywords": [
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                        "两数相除"
                      ],
                      "children": []
                    }
                  },
                  {
                    "12-整数转罗马数字": {
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                      "keywords": [
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                        "整数转罗马数字"
                      ],
                      "children": []
                    }
                  },
                  {
                    "50-Pow(x, n)": {
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                      "keywords": [
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                        "Pow(x, n)"
                      ],
                      "children": []
                    }
                  },
                  {
                    "9-回文数": {
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                      "keywords": [
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                        "回文数"
                      ],
                      "children": []
                    }
                  },
                  {
                    "66-加一": {
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                      "keywords": [
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                        "加一"
                      ],
                      "children": []
                    }
                  },
                  {
                    "7-整数反转": {
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                      "keywords": [
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                        "整数反转"
                      ],
                      "children": []
                    }
                  },
                  {
                    "67-二进制求和": {
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                      "keywords": [
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                        "二进制求和"
                      ],
                      "children": []
                    }
                  },
                  {
                    "69-x 的平方根": {
                      "node_id": "algorithm-6b2828daf66f43479d2d2a7e27e23932",
                      "keywords": [
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                        "x 的平方根"
                      ],
                      "children": []
                    }
                  },
                  {
                    "13-罗马数字转整数": {
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                      "keywords": [
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                        "罗马数字转整数"
                      ],
                      "children": []
                    }
                  },
                  {
                    "60-排列序列": {
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                      "keywords": [
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                        "排列序列"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-设计": {
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                "keywords": [],
                "children": [
                  {
                    "355-设计推特": {
                      "node_id": "algorithm-49a663e34f3b4ac9add98217d48818d5",
                      "keywords": [
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                        "设计推特"
                      ],
                      "children": []
                    }
                  },
                  {
                    "380-O(1) 时间插入、删除和获取随机元素": {
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                      "keywords": [
                        "leetcode",
                        "O(1) 时间插入、删除和获取随机元素"
                      ],
                      "children": []
                    }
                  },
                  {
                    "381-O(1) 时间插入、删除和获取随机元素 - 允许重复": {
                      "node_id": "algorithm-6abc321e067448a9bb47798f8c2732dc",
                      "keywords": [
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                        "O(1) 时间插入、删除和获取随机元素 - 允许重复"
                      ],
                      "children": []
                    }
                  },
                  {
                    "460-LFU 缓存": {
                      "node_id": "algorithm-9040820680414422982aed00e3774d88",
                      "keywords": [
                        "leetcode",
                        "LFU 缓存"
                      ],
                      "children": []
                    }
                  },
                  {
                    "146-LRU 缓存机制": {
                      "node_id": "algorithm-4c1b7da5fd2f40e889d75e8e2b3446f0",
                      "keywords": [
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                        "LRU 缓存机制"
                      ],
                      "children": []
                    }
                  },
                  {
                    "173-二叉搜索树迭代器": {
                      "node_id": "algorithm-bfd16b54a79348af9077cc46f46e5169",
                      "keywords": [
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                        "二叉搜索树迭代器"
                      ],
                      "children": []
                    }
                  },
                  {
                    "208-实现 Trie (前缀树)": {
                      "node_id": "algorithm-14d4d8e793b84c1cb3efe42497cfb78c",
                      "keywords": [
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                        "实现 Trie (前缀树)"
                      ],
                      "children": []
                    }
                  },
                  {
                    "535-TinyURL 的加密与解密": {
                      "node_id": "algorithm-c0fc6a20b2914daba094b822d884d76f",
                      "keywords": [
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                        "TinyURL 的加密与解密"
                      ],
                      "children": []
                    }
                  },
                  {
                    "341-扁平化嵌套列表迭代器": {
                      "node_id": "algorithm-b52188ca107f42db935096b8640aa995",
                      "keywords": [
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                        "扁平化嵌套列表迭代器"
                      ],
                      "children": []
                    }
                  },
                  {
                    "297-二叉树的序列化与反序列化": {
                      "node_id": "algorithm-7d5924a413584b319285481e9745c0d9",
                      "keywords": [
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                        "二叉树的序列化与反序列化"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-动态规划": {
                "node_id": "algorithm-ccd7be39bf4b448595d10de0f56c1f05",
                "keywords": [],
                "children": [
                  {
                    "22-括号生成": {
                      "node_id": "algorithm-2bd98707da9f4fe1b34ab125fa4664ea",
                      "keywords": [
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                        "括号生成"
                      ],
                      "children": []
                    }
                  },
                  {
                    "64-最小路径和": {
                      "node_id": "algorithm-007763b750db43dfb51105ee27c501c2",
                      "keywords": [
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                        "最小路径和"
                      ],
                      "children": []
                    }
                  },
                  {
                    "91-解码方法": {
                      "node_id": "algorithm-4d49162365f44fe997bd2c115096054f",
                      "keywords": [
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                        "解码方法"
                      ],
                      "children": []
                    }
                  },
                  {
                    "10-正则表达式匹配": {
                      "node_id": "algorithm-99b5757ef6c441b3b2d31ea1c54d2469",
                      "keywords": [
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                        "正则表达式匹配"
                      ],
                      "children": []
                    }
                  },
                  {
                    "5-最长回文子串": {
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                      "keywords": [
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                        "最长回文子串"
                      ],
                      "children": []
                    }
                  },
                  {
                    "53-最大子序和": {
                      "node_id": "algorithm-bdd35a378b5b4b0db56eb77dbb0ecc4d",
                      "keywords": [
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                        "最大子序和"
                      ],
                      "children": []
                    }
                  },
                  {
                    "62-不同路径": {
                      "node_id": "algorithm-f240918fc113412798699dc069297b46",
                      "keywords": [
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                        "不同路径"
                      ],
                      "children": []
                    }
                  },
                  {
                    "72-编辑距离": {
                      "node_id": "algorithm-0dceaf29e6ea481aad96eafd5b0810d6",
                      "keywords": [
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                        "编辑距离"
                      ],
                      "children": []
                    }
                  },
                  {
                    "85-最大矩形": {
                      "node_id": "algorithm-dba5ee6be2e6429b84e0396156bae1c5",
                      "keywords": [
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                        "最大矩形"
                      ],
                      "children": []
                    }
                  },
                  {
                    "63-不同路径 II": {
                      "node_id": "algorithm-ec12f1edbe454de9a8b17515ac7919ad",
                      "keywords": [
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                        "不同路径 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "70-爬楼梯": {
                      "node_id": "algorithm-97049e95c4cc42f8afac4633eba54b5b",
                      "keywords": [
                        "leetcode",
                        "爬楼梯"
                      ],
                      "children": []
                    }
                  },
                  {
                    "44-通配符匹配": {
                      "node_id": "algorithm-718f13cb1b244f98a74f2e7a1a2f8bf0",
                      "keywords": [
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                        "通配符匹配"
                      ],
                      "children": []
                    }
                  },
                  {
                    "87-扰乱字符串": {
                      "node_id": "algorithm-6afc7481d3174bfda698af6f144a6438",
                      "keywords": [
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                        "扰乱字符串"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-回溯算法": {
                "node_id": "algorithm-644dd585183249048a688f1cf5c35aac",
                "keywords": [],
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                  {
                    "40-组合总和 II": {
                      "node_id": "algorithm-9d93c2f12e2b43089df066eaa963f3e4",
                      "keywords": [
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                        "组合总和 II"
                      ],
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                    }
                  },
                  {
                    "52-N皇后 II": {
                      "node_id": "algorithm-b88009c360534ffdb356b60ca011f92b",
                      "keywords": [
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                        "N皇后 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "90-子集 II": {
                      "node_id": "algorithm-511022f82b0249f696b576f23c6bf25d",
                      "keywords": [
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                        "子集 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "89-格雷编码": {
                      "node_id": "algorithm-4691973bea6f43c5a7b67c3fe10ee149",
                      "keywords": [
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                        "格雷编码"
                      ],
                      "children": []
                    }
                  },
                  {
                    "47-全排列 II": {
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                      "keywords": [
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                        "全排列 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "17-电话号码的字母组合": {
                      "node_id": "algorithm-96cde7c2b5bf4091a13d1d062ba4416a",
                      "keywords": [
                        "leetcode",
                        "电话号码的字母组合"
                      ],
                      "children": []
                    }
                  },
                  {
                    "39-组合总和": {
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                      "keywords": [
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                        "组合总和"
                      ],
                      "children": []
                    }
                  },
                  {
                    "46-全排列": {
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                      "keywords": [
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                        "全排列"
                      ],
                      "children": []
                    }
                  },
                  {
                    "37-解数独": {
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                      "keywords": [
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                        "解数独"
                      ],
                      "children": []
                    }
                  },
                  {
                    "51-N 皇后": {
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                      "keywords": [
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                        "N 皇后"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            },
            {
              "leetcode-贪心": {
                "node_id": "algorithm-911e462b95854992909c164b57563c10",
                "keywords": [],
                "children": [
                  {
                    "122-买卖股票的最佳时机 II": {
                      "node_id": "algorithm-424ad1bf338d42138793e7a5de6df885",
                      "keywords": [
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                        "买卖股票的最佳时机 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "45-跳跃游戏 II": {
                      "node_id": "algorithm-46ce8eaf4c134e308bbf0b5bafe888e2",
                      "keywords": [
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                        "跳跃游戏 II"
                      ],
                      "children": []
                    }
                  },
                  {
                    "68-文本左右对齐": {
                      "node_id": "algorithm-942f57e096b4460e8adcf08de8cf6468",
                      "keywords": [
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                        "文本左右对齐"
                      ],
                      "children": []
                    }
                  },
                  {
                    "135-分发糖果": {
                      "node_id": "algorithm-918f2173626042b79d288599bce5804c",
                      "keywords": [
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                        "分发糖果"
                      ],
                      "children": []
                    }
                  },
                  {
                    "55-跳跃游戏": {
                      "node_id": "algorithm-c27fedd5842c4c389cc0145878b65f8c",
                      "keywords": [
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                        "跳跃游戏"
                      ],
                      "children": []
                    }
                  },
                  {
                    "134-加油站": {
                      "node_id": "algorithm-6877fe23a31441e4b26b23ed17307bdb",
                      "keywords": [
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                        "加油站"
                      ],
                      "children": []
                    }
                  },
                  {
                    "179-最大数": {
                      "node_id": "algorithm-79927151f5264497aa7cf4054ca7c573",
                      "keywords": [
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                        "最大数"
                      ],
                      "children": []
                    }
                  },
                  {
                    "316-去除重复字母": {
                      "node_id": "algorithm-b19a2b60d98244eb9e56813921864871",
                      "keywords": [
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                        "去除重复字母"
                      ],
                      "children": []
                    }
                  },
                  {
                    "321-拼接最大数": {
                      "node_id": "algorithm-476b83ac859c40f3a6efd6c3632f1ad2",
                      "keywords": [
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                        "拼接最大数"
                      ],
                      "children": []
                    }
                  },
                  {
                    "330-按要求补齐数组": {
                      "node_id": "algorithm-877445164cb3460c98afa991e4cba2d9",
                      "keywords": [
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                        "按要求补齐数组"
                      ],
                      "children": []
                    }
                  }
                ]
              }
            }
          ]
        }
      }
    ]
  }
}