LeetCode——Ugly Number
Description:
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.
寻找丑数:
public class Solution { public boolean isUgly(int num) { if(num <= 0) { return false; } while(num % 2 == 0) { num /= 2; } while(num % 3 == 0) { num /= 3; } while(num % 5 == 0) { num /= 5; } return num == 1; } }
作者:Pickle
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致读者:坚持写博客不容易,写高质量博客更难,我也在不断的学习和进步,希望和所有同路人一道用技术来改变生活。觉得有点用就点个赞哈。
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