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Ugly Number - Math - Easy - LeetCode - MiniTV

Ugly Number - Math - Easy - LeetCode - मिनी टीवी

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.

Example 1:

Input: 6
Output: true
Explanation: 6 = 2 × 3
Example 2:

Input: 8
Output: true
Explanation: 8 = 2 × 2 × 2
Example 3:

Input: 14
Output: false 
Explanation: 14 is not ugly since it includes another prime factor 7.
Note:

1 is typically treated as an ugly number.
Input is within the 32-bit signed integer range: [−231,  231 − 1].

public class Solution {
    public bool IsUgly(int num) {
        if(num <= 0){
            return false;
        }
        
        while(num%2==0){
            num=num/2;
        }
        
        while(num%3==0){
            num=num/3;
        }
        
        while(num%5==0){
            num=num/5;
        }
        return num==1;
    }
}

Time Complexity: O(n)

Space Complexity: O(1)