update exercises

data/3.算法高阶/5.leetcode-设计/2.380-O(1) 时间插入、删除和获取随机元素/solution.md

@@ -18,9 +18,9 @@
 <p><strong>示例：</strong></p>
 
 <strong>输入</strong>
+
 ```json
 ["RandomizedSet", "insert", "remove", "insert", "getRandom", "remove", "insert", "getRandom"]
-
 [[], [1], [2], [2], [], [1], [2], []]
 ```