classSolution {publicbooleancanPartitionKSubsets(int[] nums,intk) {intsum =sum(nums);//check if possible to have K equal sum subsetsif(sum % k != 0) {returnfalse; }intsubSum = sum /k; Arrays.sort(nums);intbeginIndex = nums.length - 1;//check if the largest num is greater than...
Given an array of integers nums and a positive integer k, find whether it’s possible to divide this array into k non-empty subsets whose sums are all equal. Example 1: Input: nums = [4, 3, 2, 3, 5, 2, 1], k = 4 Output: True Explanation: It’s possible to divide it into ...
首先计算sum, 看sum能否被k整除. 若不能, 铁定不能分成k组. return false. 若能的话,每组的target sum就该是sum/k. 一组一组的减掉. 直到 k = 1. 剩下最后一组, 最后一组的sum肯定是sum/k. 因为这里的已经验证过sum是k的倍数, 而前面已经有k-1组 sum/k找到了. 所以可以直接return true. This ...
dp[j] = dp[j] || dp[j - nums[i]] (nums[i] <= j <= target) 本题建议和leetcode 698. Partition to K Equal Sum Subsets K个子集 + 深度优先搜索DFS 一起学习 建议和这一道题leetcode 518. Coin Change 2 动态规划DP 、leetcode 279. Perfect Squares 类似背包问题 + 很简单的动态规划DP...
这跟之前那道Partition Equal Subset Sum很类似,但是那道题只让分成两个子集合,所以问题可以转换为是否存在和为整个数组和的一半的子集合,可以用dp来做。但是这道题让求k个和相同的,感觉无法用dp来做,因为就算找出了一个,其余的也需要验证。这道题我们可以用递归来做,首先我们还是求出数组的所有数字之和sum,...
https://leetcode.com/problems/combination-sum-iv/ https://leetcode.com/problems/partition-equal-subset-sum/ https://leetcode.com/problems/palindromic-substrings/ https://leetcode.com/problems/number-of-longest-increasing-subsequence/ https://leetcode.com/problems/partition-to-k-equal-sum-subsets...
Given a non-empty array containing only positive integers, find if the array can be partitioned into two subsets such that the sum of elements in both subsets is equal. Note: Each of the array element will not exceed 100.The array size will not exceed 200. ...
Given an array of integers nums and a positive integer k, find whether it's possible to divide this array into k non-empty subsets whose sums are all equal. Example 1: Input: nums = [4, 3, 2, 3, 5, 2, 1], k = 4 Output: True ...
https://leetcode.cn/problems/make-the-xor-of-all-segments-equal-to-zero 不难看出结果数组一定是长为k的周期数组,因此应当对k取模分组进行DP,并要求所有组修改成的值的异或和为0。但如果对每个状态都枚举修改成m需要的次数的所有合理的m,总复杂度肯定不允许。必须分析出哪些状态不可能是最终答案,并将这些...
题目描述: LeetCode 416. Partition Equal Subset Sum Given a non-empty array containing only positive integers, find if the array can be partitioned into two subsets such that the sum of elements in both subsets is equal. Note: Both the array size and eac