#include <stdlib.h>

int n;

int f();

int main(int argc, char **argv) 
{

   n = atoi(argv[1]);

   int a[n*n];

   int b[n];
   for (int i = 0; i < n; i++) 
      b[i] = i;

   int k = f();
   for (int i = 0; i < n; i++) {
      int ni = n * i;
      for (int j = 0; j < n; j++) {
         a[ni + j] = k * b[j];
      }
   }

}

int f()
{
   int sum = 0;
   for (int i = 0; i < n; i++) 
      sum += i;
   return sum;

}