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    leetcode-Ugly Number

    3/8/2017来源:ASP.NET技巧人气:9496

    Question:

    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.

    Solution:

    class Solution { public: bool isUgly(int num) { if(num == 0){ return false; } while(num != 1){ if(num %2 != 0 && num %3 != 0 && num % 5 != 0){ return false; } if(num%2 == 0){ num /= 2; } if(num%3 == 0){ num /= 3; } if(num%5 == 0){ num /= 5; } } return true; } };

    总结:

    注意while判断条件是num!=1,而不是 num != 0



    金诺时时彩软件怎么样

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