LeetCode-263-丑数

丑数

解法一：遍历

public class LeetCode_263 {
    public static boolean isUgly(int n) {
        if (n == 0) {
            return false;
        }
        while (n % 2 == 0) {
            n = n / 2;
        }
        while (n % 3 == 0) {
            n = n / 3;
        }
        while (n % 5 == 0) {
            n = n / 5;
        }
        for (int i = 2; i <= Math.sqrt(n); i++) {
            if (n % i == 0) {
                return false;
            }
        }
        if (n == 1 || n == 2 || n == 3 || n == 5) {
            return true;
        } else {
            return false;
        }
    }

    public static void main(String[] args) {
        System.out.println(isUgly(920408890));
    }
}