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 ...
这是一个套题,和416. Partition Equal Subset Sum,473. Matchsticks to Square基本一致的代码,上面的两个题分别是求平分成2份和4份。这个是任意的k份。所以改成了k组数字记录的div,最后看是否能够正好进行平分。 直接使用回溯法即可,这个回溯的要求是恰好把nums的所有数字用过...
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/ https://leetcode.com/problems/counting-bits/ htt...
Explanation: The array cannot be partitioned into equal sum subsets. 1. 2. 3. 4. 5. 题解: 其实是找有没有sub array的数字和是sum/2. Thus for the other half, sum must be sum/2. Let dp[i] denotes if there is subarray sum equal to j. ...
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...
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,...
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 ...
Leetcode 698 Partition to K Equal Sum Subsets Leetcode 526 Beautiful Arrangement (similar to 46) 记忆化搜索(DFS + Memoization Search):算是用递归的方式实现动态规划,递归每次返回时同时记录下已访问过的节点特征,避免重复访问同一个节点,可以有效的把指数级别的DFS时间复杂度降为多项式级别; 注意这一类的DFS...
Example 1: Input:nums = [1,5,11,5]Output:trueExplanation:The array can be partitioned as [1, 5, 5] and [11]. Example 2: Input:nums = [1,2,3,5]Output:falseExplanation:The array cannot be partitioned into equal sum subsets. ...