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  • 263. Ugly Number

    Write a program to check whether a given number is an ugly number.

    Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7.

    Note that 1 is typically treated as an ugly number.

    本题要求求出ugly number,不是很难,但是要注意考虑边界条件,比如1,0两种情况,代码如下:

     1 public class Solution {
     2     public boolean isUgly(int num) {
     3         int[] factor = new int[]{2,3,5};
     4         if(num==0) return false;
     5         for(int i=0;i<factor.length;i++){
     6             while(num%factor[i]==0){
     7                 num/=factor[i];
     8             }
     9         }
    10         return num==1;
    11     }
    12 }
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  • 原文地址:https://www.cnblogs.com/codeskiller/p/6540572.html
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