2034. 股票价格波动
Medium | Hash Table, Design, Heap (Priority Queue), Data Stream, Ordered Set
Hash Table
2043. 简单银行系统
Medium | Array, Hash Table, Design, Simulation
2048. 下一个数值平衡数
Medium | Hash Table, Math, Backtracking, Counting, Enumeration
2053. 数组中的第 K 个不同字符串
Easy | Array, Hash Table, String, Counting
2068. 检查两个字符串是否几乎相等
Easy | Hash Table, String, Counting
2080. 区间频率查询
Medium | Array, Hash Table, Binary Search, Design, Segment Tree
2085. 统计出现一次的公共字符串
Easy | Array, Hash Table, String, Counting
2094. 寻找三位偶数
Easy | Array, Hash Table, Recursion, Sorting, Enumeration
2099. 找到长度为 K 且和最大的子序列
Easy | Array, Hash Table, Sorting, Heap (Priority Queue)
2103. 环和杆
Easy | Hash Table, String
2115. 从给定原料中找到所有可能的食谱
Medium | Array, Hash Table, String, Graph Theory, Topological Sort
2121. 相同元素间的间隔
Medium | Array, Hash Table, Prefix Sum
2122. 恢复原数组
Hard | Array, Hash Table, Two Pointers, Sorting, Enumeration
2131. 通过连接两字母单词构造最长回文串
Medium | Array, Hash Table, String, Greedy, Counting
2133. 检查每一行和每一列是否都包含全部整数
Easy | Array, Hash Table, Matrix
2135. 添加一个字母后得到单词的数量
Medium | Array, Hash Table, String, Bit Manipulation, Sorting
2150. 找出数组中所有孤独数字
Medium | Array, Hash Table, Counting
2154. 保持找到的值乘以二
Easy | Array, Hash Table, Sorting, Simulation
2157. 字符串分组
Hard | Array, Hash Table, String, Bit Manipulation, Union-Find
2166. 设计位集
Medium | Array, Hash Table, String, Design