practical 16

#include <stdio.h>

int main()
{
   int n,s,sum=0;

  scanf("%d",&n);

  for(int i=1;i<=n;i++)
  {
      int  n=i;
      if(i%2==0)
      {
          s=n*n;
          sum=sum+s;
      }
      else
      continue;
  }
  printf("%d",sum);


    return 0;
}