#include<stdio.h>
int main()
{
  int number = 0,sum = 0;
  printf("Enter the number ");
  scanf("%d",&number);
  int n = 1;
  while(n < number)
  {
    if(number % n == 0)
    {
      sum =sum + n;
    }
    n++;
  }
  if(sum == number)
  {
    printf("%d is a perfect number\n",number);
  }
  else
  {
    printf("%d is not a perfect number\n",number);
  }
  
  return 0;
}