We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write a function that returns true when it is a perfect number and false when it is not. Example: Input: 28 Output: True Explanation: 28 =...
原题链接在这里:https://leetcode.com/problems/perfect-number/#/description 题目: We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write a function that returns true when it is a perfect number...
本题思路就是简单的将因子相加,但是注意循环变量i不能到num,所以用i*i<=num缩小范围 代码 boolcheckPerfectNumber(intnum){intcount=0;if(num==1)returnfalse;for(inti=2;i*i<=num;i++){if(num%i==0)count+=i+num/i;}returncount+1==num?true:false;} ...
题意:计算整数N是否为Perfect Number,其定义为满足其所有因数(不包括自身)的和与该数相等; 解法:只需要计算其所有因数并求和后与此数相比较即可,这里需要注意的是给出的整数N可能为负数或零,而Perfect Number要求是正整数; Java class Solution { public boolean checkPerfectNumber(int num) { int sum = 0; ...
LeetCode Weekly Contest 25 赛题 本次周赛主要分为以下4道题: 507 Perfect Number (3分) 537 Complex Number Multiplication (6分) 545 boundary of Binary Tree (8分) 546 Remove Boxes (9分) 507 Perfect Number Problem: We define the Perfect Number is a positive integer that is equal to the su...
class Solution: def numSquares(self, n): dp = [float('inf')] * (n + 1) # 初始化一个长为 n+1 的数组,所有值设为无穷大 dp[0] = 0 # 初始化条件,0由0个平方数组成 # 对于每个小于等于n的数i,尝试所有可能的平方数 for i in range(1, n + 1): j = 1 while j * j <= i: ...
LeetCode Given a positive integern, find the least number of perfect square numbers (for example,1, 4, 9, 16, ...) which sum ton. Example 1: Input: n = 12 Output: 3 Explanation: 12 = 4 + 4 + 4. Example 2: Input: n = 13 ...
A set of practice note, solution, complexity analysis and test bench to leetcode problem set - leetcode/PerfectSquare.drawio at b58bcceb0ea27d0756ad72fb6a64b3b547fae221 · brianchiang-tw/leetcode
[LintCode/LeetCode] Perfect Squares Problem Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. Example Given n = 12, return 3 because 12 = 4 + 4 + 4...
[Leetcode] Perfect Squares 完美平方数 Perfect Squares Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. For example, given n = 12, return 3 because 12 = 4 + 4 + 4; given n = 13, return 2 because ...