3136. 有效单词
Easy | String
String
3137. 使单词变为 K 周期字符串的最少操作次数
Medium | Hash Table, String, Counting
3138. 字母异位词连接的最小长度
Medium | Hash Table, String, Counting
3143. 正方形内的最大点数
Medium | Array, Hash Table, String, Binary Search, Sorting
3144. 等频字符子串的最小分割
Medium | Hash Table, String, Dynamic Programming, Counting
3146. 两字符串的排列差值
Easy | Hash Table, String
3163. 字符串压缩 III
Medium | String
3168. 候车室最少椅子数
Easy | String, Simulation
3170. 移除星号后字典序最小的字符串
Medium | Hash Table, String, Stack, Greedy, Heap (Priority Queue)
3174. 清除数字
Easy | String, Stack, Simulation