int fib1(int n)
{
    if (n < 2) return n;
    else return fib1(n - 1) + fib1(n - 2);
}

int fib2(int n)
{
    if (n < 2) return n;
    else return fib2(n - 2) + fib2(n - 1);
}

int main(int argc, char *argv[])
{
    int n = 20 + argc - 1;
    int r1 = fib1(n);
    int r2 = fib2(n);
    return r1 + r2;
}