633. Sum of Square Numbers

2023-12-12 07:58
文章标签 sum numbers square 633

本文主要是介绍633. Sum of Square Numbers,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!

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

注意Java中平方不是^,而应该i*i或者Math.pow(i)。另外这道题主要要注意有可能是一个数的平方。即另一个为零,所以边界应该从0开始。还有两个数可能相同,所以循环条件应该是i<=j.

class Solution {public boolean judgeSquareSum(int c) {int right = (int)Math.sqrt(c);for(int i=0,j=right;i<=j;){if((i*i+j*j)==c)return true;else if((i*i+j*j)>c)j--;elsei++;}return false;}
}

 

这篇关于633. Sum of Square Numbers的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!



http://www.chinasem.cn/article/483836

相关文章

最大流=最小割=最小点权覆盖集=sum-最大点权独立集

二分图最小点覆盖和最大独立集都可以转化为最大匹配求解。 在这个基础上,把每个点赋予一个非负的权值,这两个问题就转化为:二分图最小点权覆盖和二分图最大点权独立集。   二分图最小点权覆盖     从x或者y集合中选取一些点,使这些点覆盖所有的边,并且选出来的点的权值尽可能小。 建模:     原二分图中的边(u,v)替换为容量为INF的有向边(u,v),设立源点s和汇点t

计蒜客 Half-consecutive Numbers 暴力打表找规律

The numbers 11, 33, 66, 1010, 1515, 2121, 2828, 3636, 4545 and t_i=\frac{1}{2}i(i+1)t​i​​=​2​​1​​i(i+1), are called half-consecutive. For given NN, find the smallest rr which is no smaller than NN

如何导入sun.misc.BASE64Encoder和sum.misc.BASE64Decoder

右击项目名--->Build Path--->Configure Build Path...--->java Build Path--->Access rules:1 rule defined,added to all librar...   --->Edit --->Add...

高精度打表-Factoring Large Numbers

求斐波那契数,不打表的话会超时,打表的话普通的高精度开不出来那么大的数组,不如一个int存8位,特殊处理一下,具体看代码 #include<stdio.h>#include<string.h>#define MAX_SIZE 5005#define LEN 150#define to 100000000/*一个int存8位*/int num[MAX_SIZE][LEN];void

leetcode#628. Maximum Product of Three Numbers

题目 Given an integer array, find three numbers whose product is maximum and output the maximum product. Example 1: Input: [1,2,3]Output: 6 Example 2: Input: [1,2,3,4]Output: 24 Note: The lengt

leetCode#448. Find All Numbers Disappeared in an Array

Description Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this

18. 4 Sum

题目: 解答: 与之前的三数之和的解法类似,也是先排序,然后不断剔除不可能的条件,最后两个参数,通过两头求和计算得出。 代码: class Solution {public:vector<vector<int>> fourSum(vector<int>& nums, int target) {vector<vector<int>> result;int len = nums.size

apt-get update更新源时,出现“Hash Sum mismatch”问题

转载自:apt-get update更新源时,出现“Hash Sum mismatch”问题 当使用apt-get update更新源时,出现下面“Hash Sum mismatch”的报错,具体如下: root@localhost:~# apt-get update ...... ...... W: Failed to fetch http://us.archive.ubuntu.com/ub

[LeetCode] 221. Maximal Square

题:https://leetcode.com/problems/maximal-square/description/ #题目 Given a 2D binary matrix filled with 0’s and 1’s, find the largest square containing only 1’s and return its area. Example: Input:

[LeetCode] 303. Range Sum Query - Immutable

题:https://leetcode.com/problems/range-sum-query-immutable/description/ 题目 Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. Example: Given nums