problem 633. Sum of Square Numbers 题意: solution1: 可以从c的平方根,注意即使c不是平方数,也会返回一个整型数.然后我们判断如果 i*i 等于c,说明c就是个平方数,只要再凑个0,就是两个平方数之和,返回 true:如果不等于的话,那么算出差值 c - i*i,如果这个差值也是平方数的话,返回 true.遍历结束后返回 false, class Solution { public: bool judgeSquareSum(int c) { ; --…

Difficulty: Easy  More:[目录]LeetCode Java实现 Description https://leetcode.com/problems/sum-of-square-numbers/submissions/ Given a non-negative integer c, your task is to decide whether there're two integers aand b such that a2 + b2 = c. Example 1: Inpu…

Given a non-negative integer c, decide whether there're two integers a and b such that a2 + b2 = c. 只要是two_sum 变形 都可以考虑用hash_set来做. class Solution { public: bool judgeSquareSum(int c) { //这个和两数之和很想 感觉是两数之和的变形 //先求一组两平方和之数 如果这两平方和数都存在的话 就返回true //用has…

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 双指针 列表生成式 循环 日期 题目地址:https://leetcode.com/problems/sum-of-square-numbers/discuss/ 题目描述 Given a non-negative integer c, your task is to decide whether there're two integers a an…

problem 985. Sum of Even Numbers After Queries class Solution { public: vector<int> sumEvenAfterQueries(vector<int>& A, vector<vector<int>>& queries) { vector<int> res; ; ==) sum +=a; for(auto query:queries) { ]]%== )…

Given a non-negative integer c, your task is to decide whether there're two integers a and bsuch that a2 + b2 = c. Example 1: Input: 5 Output: True Explanation: 1 * 1 + 2 * 2 = 5 Example 2: Input: 3 Output: False Accepted 38,694 Submissions 117,992  …

problem 1022. Sum of Root To Leaf Binary Numbers 参考 1. Leetcode_easy_1022. Sum of Root To Leaf Binary Numbers; 完…

Given a non-negative integer c, your task is to decide whether there're two integers a and b such that a2 + b2 = c. Example 1: Input: 5 Output: True Explanation: 1 * 1 + 2 * 2 = 5 Example 2: Input: 3 Output: False 这道题让我们求一个数是否能由平方数之和组成,刚开始博主没仔细看题,没有看…

题目如下: We have an array A of integers, and an array queries of queries. For the i-th query val = queries[i][0], index = queries[i][1], we add val to A[index].  Then, the answer to the i-th query is the sum of the even values of A. (Here, the given ind…

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 找规律 日期 题目地址:https://leetcode.com/problems/sum-of-even-numbers-after-queries/ 题目描述 We have an array A of integers, and an array queries of queries. For the i-th query val = q…