1569. 重新排列数组得到相同二叉搜索树的方案数
Hard | Array, Math, Divide and Conquer, Dynamic Programming, Tree, Union-Find, Binary Search Tree, Memoization, Combinatorics, Binary Tree
Dynamic Programming
1575. 计算所有可能的路径数目
Hard | Array, Dynamic Programming, Memoization
1578. 使绳子变彩色的最短时间
Medium | Array, String, Dynamic Programming, Greedy
1594. 矩阵中的最大非负积
Medium | Array, Dynamic Programming, Matrix
1611. 使整数变为 0 的最少操作次数
Hard | Math, Dynamic Programming, Bit Manipulation, Recursion, Memoization
1617. 统计城市间最大距离对应的子树数目
Hard | Dynamic Programming, Bit Manipulation, Tree, Enumeration, Bitmask
1621. K 个不重叠线段的数目
Medium | Math, Dynamic Programming, Combinatorics, Prefix Sum
1626. 无冲突的最佳球队
Medium | Array, Dynamic Programming, Sorting
1639. 组成目标字符串的方案数
Hard | Array, String, Dynamic Programming
1641. 统计字典序元音字符串的数目
Medium | Math, Dynamic Programming, Combinatorics