题目链接:https://leetcode.com/problems/triples-with-bitwise-and-equal-to-zero/ 题意,已知数组A,长度不超过1000,最大的数不超过$2^{16}$,问存在多少对i,j,k,使得A[i]^A[j]^a[k]=0,i,j,k可以相等. 若直接暴力复杂度为$O(n^3)$,观察到数组不超过$2^{16}$,因此可以先枚举i和j,将结果存储,则结果不超过$2^{17}$,再查找符合的k,复杂度$O(n^2+n*2^{17})$. c…

题目如下: Given an array of integers A, find the number of triples of indices (i, j, k) such that: 0 <= i < A.length 0 <= j < A.length 0 <= k < A.length A[i] & A[j] & A[k] == 0, where & represents the bitwise-AND operator. Exampl…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 日期 题目地址:https://leetcode.com/problems/triples-with-bitwise-and-equal-to-zero/ 题目描述 Given an array of integers A, find the number of triples of indices (i, j, k) such that: 0 <=…

Given an array of integers A, find the number of triples of indices (i, j, k) such that: 0 <= i < A.length 0 <= j < A.length 0 <= k < A.length A[i] & A[j] & A[k] == 0, where & represents the bitwise-AND operator. Example 1: I…

思路: 使用unordered_map暴力枚举. 实现: #include <bits/stdc++.h> using namespace std; class Solution { public: int countTriplets(vector<int>& A) { unordered_map<int, int> mp; int n = A.size(); ; i < n; i++) { ; j < n; j++) { int tmp = A[i…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 方法一:模拟过程 方法二:求和-n*最小值 方法三:排序 日期 [LeetCode] 题目地址:https://leetcode.com/problems/minimum-moves-to-equal-array-elements/ Difficulty: Easy 题目描述 Given a non-empty integer array of si…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 方法一:排序 方法二:直接找中位数 日期 题目地址:https://leetcode.com/problems/minimum-moves-to-equal-array-elements-ii/description/ 题目描述 Given a non-empty integer array, find the minimum number of m…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 回溯法 日期 题目地址:https://leetcode.com/problems/partition-to-k-equal-sum-subsets/description/ 题目描述 Given an array of integers nums and a positive integer k, find whether it's possibl…

Given a non-empty integer array, find the minimum number of moves required to make all array elements equal, where a move is incrementing a selected element by 1 or decrementing a selected element by 1. You may assume the array's length is at most 10…

这是悦乐书的第233次更新,第246篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第100题(顺位题号是453).给定大小为n的非空整数数组,找到使所有数组元素相等所需的最小移动数,其中移动将n-1个元素递增1.例如: 输入:[1,2,3] 输出:3 说明:只需要三个动作(记住每个动作增加两个元素): [1,2,3] => [2,3,3] => [3,4,3] => [4,4,4] 本次解题使用的开发工具是eclipse,jdk使用的版本是1.8,环境是wi…

problem 453. Minimum Moves to Equal Array Elements 相当于把不等于最小值的数字都减到最小值所需要次数的累加和. solution1: class Solution { public: int minMoves(vector<int>& nums) { ;//err-initialization. int mn = INT_MAX;//err. for(auto num:nums) mn = min(num, mn); for(auto…

题目 Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. For example, given the range [5, 7], you should return 4. 分析 题目字面意思是给定两个整数构成闭区间, 0 <= m <= n <= 2147483647 均为合法整数,求区…

题目如下: 解题思路:本题是[leetcode]473. Matchsticks to Square的姊妹篇,唯一的区别是[leetcode]473. Matchsticks to Square指定了分成四个子数组,而本题分成的份数不定,作为参数输入.另外,本题的测试用例好像复杂一点,因此我过滤掉了nums中值等于avg的元素,不参与后面的DFS计算,提高效率. 代码如下: class Solution(object): def canPartitionKSubsets(self, nums,…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 暴力 日期 题目地址:https://leetcode-cn.com/problems/split-array-with-equal-sum/ 题目描述 Given an array with n integers, you need to find if there are triplets (i, j, k) which satisfies fol…

# Title Solution Acceptance Difficulty Frequency     4 Median of Two Sorted Arrays       27.2% Hard     10 Regular Expression Matching       25.6% Hard     23 Merge k Sorted Lists       35.8% Hard     25 Reverse Nodes in k-Group       37.7% Hard    …

984. String Without AAA or BBB Given two integers A and B, return any string S such that: S has length A + B and contains exactly A 'a' letters, and exactly B 'b' letters; The substring 'aaa' does not occur in S; The substring 'bbb' does not occur in…

Contest 121 (题号981-984)(2019年1月27日) 链接:https://leetcode.com/contest/weekly-contest-121 总结:2019年2月22日补充的报告.当时不想写.rank:1093/3924,AC:2/4.还是太慢了. [984]String Without AAA or BBB(第一题 4分)(Greedy, M) 给了两个数字,A 代表 A 个 ‘A’, B 代表 B 个‘B’ 在字符串里面.返回一个可行的字符串,字符串中包含 A…

请点击页面左上角 -> Fork me on Github 或直接访问本项目Github地址:LeetCode Solution by Swift    说明:题目中含有$符号则为付费题目. 如:[Swift]LeetCode156.二叉树的上下颠倒 $ Binary Tree Upside Down 请下拉滚动条查看最新 Weekly Contest!!! Swift LeetCode 目录 | Catalog 序        号 题名Title 难度     Difficulty  两数之…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 公众号:负雪明烛 本文关键词:刷题顺序,刷题路径,好题,top100,怎么刷题,Leetcode, 力扣,Python, C++, Java 大家好,相信很多朋友在刷题时,看到 LeetCode 的 2000 多道题目,有点手足无措,非常需要一个刷题的顺序和清单. 我整理了在 LeetCode(中文版)上点赞数前 100 的题目,这些的题目基本都在千赞以上,全部都是好题. 举个例子,1…

题面 Given two integers \(n\) and \(x\), construct an array that satisfies the following conditions: ·for any element ai in the array, \(1≤ai<2^n\); ·there is no non-empty subsegment with bitwise XOR equal to \(0\) or \(x\), ·its length \(l\) should be…

Given a non-empty integer array, find the minimum number of moves required to make all array elements equal, where a move is incrementing a selected element by 1 or decrementing a selected element by 1. You may assume the array's length is at most 10…

Given a non-empty integer array of size n, find the minimum number of moves required to make all array elements equal, where a move is incrementing n - 1 elements by 1. Example: Input: [1,2,3] Output: 3 Explanation: Only three moves are needed (remem…

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 each of the array element will not exceed 100. Exam…

Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. For example, given the range [5, 7], you should return 4. Credits:Special thanks to @amrsaqr for adding this problem and creatin…

原题链接在这里:https://leetcode.com/problems/minimum-moves-to-equal-array-elements-ii/ 题目: Given a non-empty integer array, find the minimum number of moves required to make all array elements equal, where a move is incrementing a selected element by 1 or d…

原题链接在这里:https://leetcode.com/problems/minimum-moves-to-equal-array-elements/ 题目: Given a non-empty integer array of size n, find the minimum number of moves required to make all array elements equal, where a move is incrementing n - 1 elements by 1.…

Given an array with n integers, you need to find if there are triplets (i, j, k) which satisfies following conditions: 0 < i, i + 1 < j, j + 1 < k < n - 1 Sum of subarrays (0, i - 1), (i + 1, j - 1), (j + 1, k - 1) and (k + 1, n - 1) should be…

Given an array of integers nums and a positive integer k, find whether it's possible to divide this array into knon-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…

Given a binary tree with n nodes, your task is to check if it's possible to partition the tree to two trees which have the equal sum of values after removing exactly one edge on the original tree. Example 1: Input: 5 / \ 10 10 / \ 2 3 Output: True Ex…

Given an array with n integers, you need to find if there are triplets (i, j, k) which satisfies following conditions: 0 < i, i + 1 < j, j + 1 < k < n - 1 Sum of subarrays (0, i - 1), (i + 1, j - 1), (j + 1, k - 1) and (k + 1, n - 1) should be…