Check Perfect Number

import java.util.*;

class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int sum = 0;
for(int i = 1; i <= n/2; i++){
if(n % i == 0)
sum += i;
}
System.out.println(sum == n ? "Perfect" : "Not Perfect");
}
}