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LeetCode Weekly Contest 8 415. Add Strings User Accepted: 765 User Tried: 822 Total Accepted: 789 Total Submissions: 1844 Difficulty: Easy Given two non-negative numbers num1 and num2 represented as string, return the sum of num1 and num2. Note: The…
Weekly Contest 86 A:840. 矩阵中的幻方 3 x 3 的幻方是一个填充有从 1 到 9 的不同数字的 3 x 3 矩阵,其中每行,每列以及两条对角线上的各数之和都相等. 给定一个由整数组成的 N × N 矩阵,其中有多少个 3 × 3 的 “幻方” 子矩阵?(每个子矩阵都是连续的). 直接模拟即可,本来是签到题,由于粗心,浪费了时间. class Solution { public: int numMagicSquaresInside(vector<vector<int&…
leetcode weekly contest 43 leetcode649. Dota2 Senate leetcode649.Dota2 Senate 思路: 模拟规则round by round. class Solution { public: string predictPartyVictory(string senate) { int len = senate.size(); int r = 0; int d = 0; int i = 0; while(1) { if(senate[…
LeetCode Weekly Contest 23 1. Reverse String II Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there are less than k characters left, reverse all of them.…
链接:https://leetcode.com/contest/leetcode-weekly-contest-33/ A.Longest Harmonious Subsequence 思路:hash加查找 class Solution { public: int findLHS(vector<int>& nums) { if (nums.empty()) ; ; int len = nums.size(); unordered_map<int, int> hash(len…
闲着无聊参加了这个比赛,我刚加入战场的时候时间已经过了三分多钟,这个时候已经有20多个大佬做出了4分题,我一脸懵逼地打开第一道题 665. Non-decreasing Array My SubmissionsBack to Contest   User Accepted:1054 User Tried:1755 Total Accepted:1080 Total Submissions:7519 Difficulty:Easy Given an array with n integers, y…
We stack glasses in a pyramid, where the first row has 1 glass, the second row has 2 glasses, and so on until the 100th row.  Each glass holds one cup (250ml) of champagne. Then, some champagne is poured in the first glass at the top.  When the top m…
第一题:905. 按奇偶校验排序数组 问题: 给定一个非负整数数组 A,返回一个由 A 的所有偶数元素组成的数组,后面跟 A 的所有奇数元素. 你可以返回满足此条件的任何数组作为答案. 示例: 输入:[3,1,2,4] 输出:[2,4,3,1] 输出 [4,2,3,1],[2,4,1,3] 和 [4,2,1,3] 也会被接受. 提示: 1 <= A.length <= 5000 0 <= A[i] <= 5000 链接:https://leetcode-cn.com/contest…
前一段时间比较忙,而且做这个对于我来说挺耗时间的,已经间隔了几期的没做总结了,后面有机会补齐.而且本来做这个的目的就是为了防止长时间不做把编程拉下,不在追求独立作出所有题了.以后完赛后稍微尝试下,做不出来的直接放弃. 第一题:问题 问题:900. RLE 迭代器 编写一个遍历游程编码序列的迭代器. 迭代器由 RLEIterator(int[] A) 初始化,其中 A 是某个序列的游程编码.更具体地,对于所有偶数i,A[i] 告诉我们在序列中重复非负整数值 A[i + 1] 的次数. 迭代器支持一…
第一题:转置矩阵 问题: 给定一个矩阵 A, 返回 A 的转置矩阵. 矩阵的转置是指将矩阵的主对角线翻转,交换矩阵的行索引与列索引. 示例 1: 输入:[[1,2,3],[4,5,6],[7,8,9]] 输出:[[1,4,7],[2,5,8],[3,6,9]] 示例 2: 输入:[[1,2,3],[4,5,6]] 输出:[[1,4],[2,5],[3,6]] 提示: 1 <= A.length <= 1000 1 <= A[0].length <= 1000 链接:https://…