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 13 = 4 + 9. 动态规划 复杂度 时间O...
本次解题使用的开发工具是eclipse,jdk使用的版本是1.8,环境是win7 64位系统,使用Java语言编写和测试。 02 第一种解法 暴力解法,定义一个long类型的变量,for循环判断其平方是否小于num,但是不要写循环体,这样省时,最后直接判断其平方是否等于num。 public boolean isPerfectSquare(intnum) {if(num<=1) {returnnum...
LeetCode OJ:Perfect Squares(完美平方) Given a positive integern, find the least number of perfect square numbers (for example,1, 4, 9, 16, ...) which sum ton. For example, givenn=12, return3because12 = 4 + 4 + 4; givenn=13, return2because13 = 4 + 9. 题目如上,实际上相当于...
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 Given n = 13, return 2 because 13 = 4 + 9 Note 这道题在OJ有很多解法,公式法,递...
LeetCode Top 100 Liked Questions 279. Perfect Squares (Java版; Medium) 题目描述 Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. Example 1: Input: n = 12 ...
a square number is 1+3+5+7+... Time Complexity O(sqrt(N)) 1. 这个性质就是说一个完全平方数是从1开始的若干连续奇数的和。 代码如下。 public class Solution { public boolean isPerfectSquare(int num) { for(int i = 1; num > 0; i += 2){ ...
To make your job easier, we have given you a helper method named largestSquare() that takes a positive integer n and returns the largest perfect square less than or equal to n.我的代码在这……import java.util.*class ArrayBag public static int terms[]={0,0,0,0}...
A number x is said to be a perfect square if there exists an integer y such that x = y2. Input The first line contains a single integer n (1 ≤ n ≤ 1000) — the number of elements in the array. The second line contains n integers a1, a2, ..., an (...
自己写出来的。 本来以为不会有溢出的测试例子,没想到还是有。 然后只能再详细写一下。 题目本身不难。 然后看了下discuss,觉得有个解法很有意思。 具体见: https://discuss.leetcode.com/topic/49325/a-square-number-is-1-3-5-7-java-code/5
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