2338. 统计理想数组的数目
Hard | Math, Dynamic Programming, Combinatorics, Number Theory
Combinatorics
2400. 经过 k 步到达位置的方案数
Medium | Math, Dynamic Programming, Combinatorics
1916. 蚁群建房间的方案数
Hard | Array, Math, Dynamic Programming, Tree, Depth-First Search, Graph Theory, Topological Sort, Combinatorics
3577. 计算计算机解锁排列的数量
Medium | Array, Math, Brainteaser, Combinatorics
3250. 单调对的数目 I
Hard | Array, Math, Dynamic Programming, Combinatorics, Prefix Sum
3251. 单调数对的数目 II
Hard | Array, Math, Dynamic Programming, Combinatorics, Prefix Sum
3272. 寻找好整数的数量
Hard | Hash Table, Math, Combinatorics, Enumeration
3312. 排序的最大公约数对查询
Hard | Array, Hash Table, Math, Binary Search, Combinatorics, Counting, Number Theory, Prefix Sum
3317. 找到事件的可能方案数
Hard | Math, Dynamic Programming, Combinatorics
3343. 平衡排列的数量
Hard | Math, String, Dynamic Programming, Combinatorics
3352. 统计小于 N 的 K 可约简数字
Hard | Math, String, Dynamic Programming, Combinatorics
3395. 具有唯一中间众数的子序列 I
Hard | Array, Hash Table, Math, Combinatorics
3405. 统计有 K 个匹配相邻元素的数组数目
Hard | Math, Combinatorics
3426. 所有棋子排列的曼哈顿距离
Hard | Math, Combinatorics
3428. 最多K个元素子序列的最大值和最小值之和
Medium | Array, Math, Dynamic Programming, Sorting, Combinatorics
3461. 检查操作后字符串中的数字是否相等 I
Easy | Math, String, Simulation, Combinatorics, Number Theory
3463. 检查操作后字符串中的数字是否相等 II
Hard | Math, String, Combinatorics, Number Theory
3470. 交替排列 IV
Hard | Array, Math, Combinatorics, Enumeration
3518. 最小回文重排 II
Hard | Hash Table, Math, String, Combinatorics, Counting
3539. 寻找神奇序列的数组乘积之和
Hard | Array, Math, Dynamic Programming, Bit Manipulation, Combinatorics, Bitmask