2169. 计算使数字变为零的操作次数
Easy | Math, Simulation
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2170. 使数组交替的最少操作数
Medium | Array, Hash Table, Greedy, Counting
2171. 移除魔法豆的最小数量
Medium | Array, Greedy, Sorting, Enumeration, Prefix Sum
2172. 数组的最大与和
Hard | Array, Dynamic Programming, Bit Manipulation, Bitmask
2177. 找到和为给定数字的三个连续整数
Medium | Math, Simulation
2178. 正偶数的最大分割
Medium | Math, Backtracking, Greedy
2179. 统计数组中的好三元组
Hard | Array, Binary Search, Divide and Conquer, Binary Indexed Tree, Segment Tree, Merge Sort, Ordered Set
2180. 统计各位数字之和为偶数的正整数个数
Easy | Math, Simulation
2181. 合并零之间的节点
Medium | Linked List, Simulation
2182. 构造限制重复的字符串
Medium | Hash Table, String, Greedy, Heap (Priority Queue), Counting