// -*- mode: c++ -*-
// $Id: ackermann.g++,v 1.4 2001/07/15 03:37:00 doug Exp $
// http://www.bagley.org/~doug/shootout/

//** This copy courtesy of http://www.kano.net/javabench/
//**  inline ack()
//**  Added Timer() code

#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>

using namespace std;

inline int ack(int M, int N) { return (M ? (ack(M-1,N ? ack(M,(N-1)) : 1)) : N+1); }

int main(int argc, char *argv[]) {
	int n = ((argc == 2) ? atoi(argv[1]) : 1);
	clock_t start=clock(); 
	cout << "ack(3," << n << "): " << ack(3, n) << endl;
    clock_t endt=clock(); 
	cout <<"Time: " << double(endt-start)/CLOCKS_PER_SEC * 1000 << " ms\n"; 
	return(0);
}