diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/exercies.md" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/exercies.md"
new file mode 100644
index 0000000000000000000000000000000000000000..15d5bd11fb1a96ed84e92634952d498522fef5fa
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/exercies.md"
@@ -0,0 +1,33 @@
+# 覆盖面积
+
+给你 二维 平面上两个 由直线构成且边与坐标轴平行/垂直 的矩形，请你计算并返回两个矩形覆盖的总面积。
+
+每个矩形由其 左下 顶点和 右上 顶点坐标表示：
+
+第一个矩形由其左下顶点 (ax1, ay1) 和右上顶点 (ax2, ay2) 定义。
+第二个矩形由其左下顶点 (bx1, by1) 和右上顶点 (bx2, by2) 定义。
+
+参数限制：
+-10e4 <= ax1, ay1, ax2, ay2, bx1, by1, bx2, by2 <= 10e4
+
+## 输入描述
+第一个矩形由其左下顶点 (ax1, ay1) 和右上顶点 (ax2, ay2) 坐标
+第二个矩形由其左下顶点 (bx1, by1) 和右上顶点 (bx2, by2) 坐标
+## 输出描述
+两个矩形覆盖的总面积.
+
+# 示例
+
+## 示例 1：
+
+输入：ax1 = -3, ay1 = 0, ax2 = 3, ay2 = 4, bx1 = 0, by1 = -1, bx2 = 9, by2 = 2
+输出：45
+
+## 示例 2：
+
+输入：ax1 = -2, ay1 = -2, ax2 = 2, ay2 = 2, bx1 = -2, by1 = -2, bx2 = 2, by2 = 2
+输出：16
+
+# 提示
+无.
+
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/solution.java" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/solution.java"
new file mode 100644
index 0000000000000000000000000000000000000000..87d9abdd83047cebb5a62862b9f6cb8e06fe9670
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/solution.java"
@@ -0,0 +1,8 @@
+class Solution {
+    public int computeArea(int ax1, int ay1, int ax2, int ay2, int bx1, int by1, int bx2, int by2) {
+        int area1 = (ax2 - ax1) * (ay2 - ay1), area2 = (bx2 - bx1) * (by2 - by1);
+        int overlapWidth = Math.min(ax2, bx2) - Math.max(ax1, bx1), overlapHeight = Math.min(ay2, by2) - Math.max(ay1, by1);
+        int overlapArea = Math.max(overlapWidth, 0) * Math.max(overlapHeight, 0);
+        return area1 + area2 - overlapArea;
+    }
+}
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/1.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/1.in"
new file mode 100644
index 0000000000000000000000000000000000000000..6ad5f7adf6c49703f2ee9ffc97383f7b5a5fd808
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/1.in"
@@ -0,0 +1,8 @@
+-3
+0
+3
+4
+0
+-1
+9
+2
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/1.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/1.out"
new file mode 100644
index 0000000000000000000000000000000000000000..7d37386284a97324cbac474cb5ea5360d361d104
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/1.out"
@@ -0,0 +1 @@
+45
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/10.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/10.in"
new file mode 100644
index 0000000000000000000000000000000000000000..7a6440037d7128a86decad5ad7c496ad65354d6a
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/10.in"
@@ -0,0 +1,8 @@
+-10
+-10
+0
+0
+-10
+-10
+0
+0
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/10.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/10.out"
new file mode 100644
index 0000000000000000000000000000000000000000..105d7d9ad3afc7bb78a0dec4d829880831605dfb
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/10.out"
@@ -0,0 +1 @@
+100
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/2.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/2.in"
new file mode 100644
index 0000000000000000000000000000000000000000..f61d8196f23716835f6e6a7a08f684491c22eb6c
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/2.in"
@@ -0,0 +1,8 @@
+0
+0
+0
+0
+0
+0
+0
+0
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/2.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/2.out"
new file mode 100644
index 0000000000000000000000000000000000000000..c227083464fb9af8955c90d2924774ee50abb547
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/2.out"
@@ -0,0 +1 @@
+0
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/3.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/3.in"
new file mode 100644
index 0000000000000000000000000000000000000000..e2b82c7793bf485531d3d0a32acad85f9abbc973
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/3.in"
@@ -0,0 +1,8 @@
+-100
+-100
+100
+100
+-100
+-100
+100
+100
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/3.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/3.out"
new file mode 100644
index 0000000000000000000000000000000000000000..7030076e245dac1f46f5d9e6eee1613d0dd93f7d
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/3.out"
@@ -0,0 +1 @@
+40000
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/4.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/4.in"
new file mode 100644
index 0000000000000000000000000000000000000000..bc7a5032f7943efc9039dc06d11682b9863d2f9a
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/4.in"
@@ -0,0 +1,8 @@
+-1
+-1
+1
+1
+-1
+-1
+1
+1
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/4.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/4.out"
new file mode 100644
index 0000000000000000000000000000000000000000..bf0d87ab1b2b0ec1a11a3973d2845b42413d9767
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/4.out"
@@ -0,0 +1 @@
+4
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/5.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/5.in"
new file mode 100644
index 0000000000000000000000000000000000000000..8d2e0f484acca99a06a435985c2c0b327b796940
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/5.in"
@@ -0,0 +1,8 @@
+-10
+-10
+10
+10
+-10
+-10
+10
+10
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/5.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/5.out"
new file mode 100644
index 0000000000000000000000000000000000000000..6b3ed8d68b037971d3b708a8060117ea8b6afbac
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/5.out"
@@ -0,0 +1 @@
+400
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/6.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/6.in"
new file mode 100644
index 0000000000000000000000000000000000000000..be90ef95cd749c740d08deac7f39f3f1b4db528d
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/6.in"
@@ -0,0 +1,8 @@
+-5
+-5
+5
+5
+-5
+-5
+5
+5
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/6.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/6.out"
new file mode 100644
index 0000000000000000000000000000000000000000..105d7d9ad3afc7bb78a0dec4d829880831605dfb
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/6.out"
@@ -0,0 +1 @@
+100
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/7.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/7.in"
new file mode 100644
index 0000000000000000000000000000000000000000..0f6ffe0a129f23a4ee73a653d60a053f013c9cde
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/7.in"
@@ -0,0 +1,8 @@
+-1
+-1
+0
+0
+-1
+-1
+0
+0
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/7.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/7.out"
new file mode 100644
index 0000000000000000000000000000000000000000..56a6051ca2b02b04ef92d5150c9ef600403cb1de
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/7.out"
@@ -0,0 +1 @@
+1
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/8.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/8.in"
new file mode 100644
index 0000000000000000000000000000000000000000..834f93211ad37cb6196dc3f8a4292d4e435389d7
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/8.in"
@@ -0,0 +1,8 @@
+0
+0
+1
+1
+0
+0
+1
+1
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/8.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/8.out"
new file mode 100644
index 0000000000000000000000000000000000000000..56a6051ca2b02b04ef92d5150c9ef600403cb1de
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/8.out"
@@ -0,0 +1 @@
+1
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/9.in" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/9.in"
new file mode 100644
index 0000000000000000000000000000000000000000..a1ec51d373de69e9beaf2f175a20761b6bc5393c
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/9.in"
@@ -0,0 +1,8 @@
+0
+0
+10
+10
+0
+0
+10
+10
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/9.out" "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/9.out"
new file mode 100644
index 0000000000000000000000000000000000000000..105d7d9ad3afc7bb78a0dec4d829880831605dfb
--- /dev/null
+++ "b/exercises/chenguangjian/\344\270\255\347\255\211/\350\246\206\347\233\226\351\235\242\347\247\257/test_cases/9.out"
@@ -0,0 +1 @@
+100
\ No newline at end of file
diff --git "a/exercises/chenguangjian/\345\233\260\351\232\276/\346\261\202\350\247\243\347\247\251\347\237\251\351\230\265/exercises.md" "b/exercises/chenguangjian/\345\233\260\351\232\276/\346\261\202\350\247\243\347\247\251\347\237\251\351\230\265/exercises.md"
index ac970431b7397cd8f810a21303df1ebee8a26cec..4506e8ea9b3b8d9a5601e981c28291147a1b0c2e 100644
--- "a/exercises/chenguangjian/\345\233\260\351\232\276/\346\261\202\350\247\243\347\247\251\347\237\251\351\230\265/exercises.md"
+++ "b/exercises/chenguangjian/\345\233\260\351\232\276/\346\261\202\350\247\243\347\247\251\347\237\251\351\230\265/exercises.md"
@@ -16,7 +16,7 @@
 m == matrix.length
 n == matrix[i].length
 1 <= m, n <= 500
--10^9 <= matrix[row][col] <= 10^9
+-10e9 <= matrix[row][col] <= 10e9
 
 # 示例
 
diff --git "a/exercises/chenguangjian/\351\235\236\347\274\226\347\250\213\351\242\230/\351\242\230\347\233\256.md" "b/exercises/chenguangjian/\351\235\236\347\274\226\347\250\213\351\242\230/\351\242\230\347\233\256.md"
index d3a305cfa8cfb6b64bc7fc19523f962124863417..9116eca0d851b794ae3ad8cd4f819b64e649e47e 100644
--- "a/exercises/chenguangjian/\351\235\236\347\274\226\347\250\213\351\242\230/\351\242\230\347\233\256.md"
+++ "b/exercises/chenguangjian/\351\235\236\347\274\226\347\250\213\351\242\230/\351\242\230\347\233\256.md"
@@ -30,15 +30,14 @@
 
    解析：MapReduce是一种用于大数据处理的分布式计算模型。它可以将大数据集分成许多小的数据块进行并行处理，然后将结果整合在一起。SQL和NoSQL都是用于数据存储的技术，而不是数据处理的技术。手写代码虽然可以完成大数据处理，但是不如使用现有的技术方便和高效。
 
-4. OLAP（联机分析处理）是指什么？
-   A. 一种数据库管理系统
-   B. 一种数据仓库
-   C. 一种数据处理技术
-   D. 一种数据挖掘算法
+4. OLAP（在线分析处理）主要用于支持以下哪种类型的查询：
+   A. 事务处理查询
+   B. 聚合查询
+   C. 实时查询
+   D. 文本查询
 
-   答案：C
-
-   解析：OLAP（Online Analytical Processing，联机分析处理）是一种数据处理技术，用于多维数据分析和查询。它可以对大量数据进行快速的复杂分析和查询，以支持商业智能和决策支持系统。数据仓库则是存储数据的地方，而OLAP是对数据仓库中的数据进行处理和分析的技术。
+   答案：B
+   解析：OLAP（在线分析处理）是一种针对多维数据仓库设计的技术，主要用于支持复杂的聚合查询，如数据挖掘、报表生成等。与事务处理查询（如增删改查）相比，OLAP 更注重对大量数据进行高效的汇总和分析。
 
 5. ACID是什么意思？
    A. 一种数据库管理系统