#include <stdio.h>

/* Voilà un commentaire. */

long
fibo (long n)
{
  if (n < 2)
    return n;
  else
    return fibo (n - 2) + fibo (n - 1);
}


int
main (void)
{
  printf ("%li\n", fibo (39));
  return 0;
}