#include <stdio.h>

int compute_sum (int n){
   int  sum = 0;

   for ( ; n > 0; --n)
      sum += n;

   printf("%d ", n);

   return sum;
}

int main (void){
   int n = 3, sum;

   printf("%d ", n);

   sum = compute_sum(n);

   printf("%d ", n);
   printf("%d", sum);

   return 0;
}