3621. 具有 Popcount-Depth 等于 K 的整数数量 I
Hard | Math, Dynamic Programming, Bit Manipulation, Combinatorics
Combinatorics
3725. 从行中选择互质整数的方案数
Hard | Array, Math, Dynamic Programming, Matrix, Combinatorics, Number Theory
3757. 有效子序列的数量
Hard | Array, Math, Dynamic Programming, Bit Manipulation, Combinatorics
3821. 寻找第N个有K个1的最小整数
Hard | Math, Bit Manipulation, Combinatorics
3855. 范围内K位数字的和
Hard | Math, Divide and Conquer, Combinatorics, Number Theory
3881. 有确切K个可见人的方向分配
Medium | Math, Combinatorics
2963. 统计好分割方案的数目
Hard | Array, Hash Table, Math, Combinatorics
3116. 单一面额组合的第K小金额
Hard | Array, Math, Binary Search, Bit Manipulation, Combinatorics, Number Theory
3128. 直角三角形
Medium | Array, Hash Table, Math, Combinatorics, Counting
3154. 寻找到达第K级台阶的方案数
Hard | Math, Dynamic Programming, Bit Manipulation, Memoization, Combinatorics