#include<stdio.h>

int main()
{
   int i, t;
   t=0;
   printf("Enter total months due: ");
   scanf("%d",&i);
   for(i=i-2;i>0 ;i-- )
   {
      t = t + i * 100;
   }
   printf("Total penalty due: %d",t);

   return 0;
}