#include <library.h>

int sum_squares_down_from_v1(int N)
{ if (N <= 0)
    return 0;
  else
  { const int N_squared = N*N;
    const int other_squares = sum_squares_down_from_v1(N-1);
    return N_squared + other_squares; } }

int sum_squares_down_from_v2(int N, int sum_so_far) // an ACCUMULATING parameter
{ if (N <= 0)
    return sum_so_far;
  else
    return sum_squares_down_from_v2(N-1, sum_so_far + N*N); }
// MUST have that return

void main()
{ const int x = read_int();
  const int sum1 = sum_squares_down_from_v1(x);
  print("sum 1 is ");
  print(sum1);
  new_line();
  const int sum2 = sum_squares_down_from_v2(x, 0);
  print("sum 2 is ");
  print(sum2);
  new_line(); }