[LeetCode] 263. Ugly Number

轉自LeetCode

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>
直接照著題意做即可

code 如下
c++

	class Solution {
	public:
	bool 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;
	}
	};

view raw uglyNumber.cpp hosted with ❤ by GitHub

Kotlin

	class Solution {
	fun isUgly(n: Int): Boolean {
	var num = n
	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
	}
	}

view raw ugly_number.kt hosted with ❤ by GitHub