main :: () -> void {
  print_u64 fibo(10);
};

f :: (a:u64,b:u64)->u64{
  return b-a;
};

fibo :: (a:u64)->u64{
  if a == 0
    return 1;
  else if a == 1
    return 1;
  else
    return fibo(a-1)+fibo(a-2);
};