Happy Number

Problem Statement

Input Format

A single integer N.

Output Format

Print 'Happy' if N is a happy number, otherwise 'Unhappy'.

Constraints

1 <= N <= 10000

Sample Input

19

Sample Output

Happy

Explanation

1^2 + 9^2 = 82 -> 8^2 + 2^2 = 68 -> 6^2 + 8^2 = 100 -> 1^2 + 0^2 + 0^2 = 1.

Starter Code

#include <stdio.h>

int sum_squares(int n) {
    int sum = 0;
    while (n > 0) {
        int d = n % 10;
        sum += d * d;
        n /= 10;
    }
    return sum;
}

int main() {
    int n;
    if (scanf("%d", &n) == 1) {
        // Write your code here
    }
    return 0;
}

Limits

• Time Limit: 1s
• Memory Limit: 256MB