#include <stdio.h>
 
// Function declaration
int isPerfect(int num);
 
int main() {
    int number;
 
    // Input number
    printf("Enter a number: ");
    scanf("%d", &number);
 
    // Function call
    if (isPerfect(number))
        printf("%d is a Perfect number.\n", number);
    else
        printf("%d is not a Perfect number.\n", number);
 
    return 0;
}
 
// Function to check perfect number
int isPerfect(int num) {
    int sum = 0;
 
    // Find divisors and sum them
    for (int i = 1; i <= num / 2; i++) {
        if (num % i == 0)
            sum += i;
    }
 
    // Check if sum equals original number
    if (sum == num)
        return 1;  // Perfect number
    else
        return 0;  // Not perfect
}