package code; /* * 263. Ugly Number * 题意:因子只包含2,3,5的数称为丑数 * 难度:Easy * 分类:Math * 思路: * Tips: */ public class lc263 { public boolean isUgly(int num) { if(num==0) return false; if(num==1) return true; while(num%2==0) num/=2; while(num%3==0) num/=3; while(num%5==0) num/=5; return num==1; } }