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 字典统计 代码 复杂度分析 日期 题目地址:https://leetcode.com/problems/number-of-equivalent-domino-pairs/ 题目描述 Given a list of dominoes, dominoes[i] = [a, b] is equivalent to dominoes[j] = [c, d]…

题目如下: Given a list of dominoes, dominoes[i] = [a, b] is equivalent to dominoes[j] = [c, d] if and only if either (a==c and b==d), or (a==d and b==c) - that is, one domino can be rotated to be equal to another domino. Return the number of pairs (i, j)…

problem 1128. Number of Equivalent Domino Pairs solution1: 不明白为什么每个元素都要加上count: class Solution { public: int numEquivDominoPairs(vector<vector<int>>& dominoes) { ; unordered_map<int, int> count; for(auto d:dominoes) { res += count[mi…

[LeetCode]Largest Number 解题报告 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/largest-number/#/description 题目描述: Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], t…

[LeetCode]792. Number of Matching Subsequences 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/number-of-matching-subsequences/description/ 题目描述: Given string S and a dictionary of words words,…

[LeetCode]673. Number of Longest Increasing Subsequence 解题报告(Python) 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/number-of-longest-increasing-subsequence/description/ 题目描述: Given an unsorted array of integers, find the number of longest inc…

这是小川的第394次更新,第428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259题(顺位题号是1128).给定多米诺骨牌列表,当且仅当(a == c且b == d)或(a == d且b == c),dominoes[i] = [a,b]等价于dominoes[j] = [c,d],也就是说,一个多米诺骨牌可以旋转到等价于另一个多米诺骨牌. 返回0 <= i < j < dominoes.length,并且dominoes[i]等价于dominoes[…

Single Number I : Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? Solution: 解法不少,贴一种: class…

原题链接 https://leetcode.com/problems/number-complement/ 原题 Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation. Note: The given integer is guaranteed to fit within the range o…

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 右移32次 计算末尾的1的个数 转成二进制统计1的个数 使用mask 日期 [LeetCode] 题目地址:https://leetcode.com/problems/number-of-1-bits/ Total Accepted: 88721 Total Submissions: 236174 Difficulty: Easy 题目描述 Writ…