Perfect Number

Given a positive integer N as the input, the program must print yes if N is a perfect number. Else no must be printed.

Input Format:
The first line contains N.

Output Format:
The first line contains yes or no

Boundary Conditions:
1 <= N <= 999999

Example Input/Output 1:
Input:
6

Output:
yes

Example Input/Output 2:
Input:
8

Output:
no

Program:

#include<stdio.h>

#include <stdlib.h>

int main()

{

int n,s=0;

scanf("%d",&n);

for(int i=1;i<=n/2;i++)

{

    if(n%i==0)

    {

        s=s+i;

    }

}

if(s==n)

{

    printf("yes");

}

else

{

    printf("no");

}

}