#!/usr/local/bin/tcc -run
 #include <stdio.h>
 
int ackermann(int m, int n)
{
        if (!m) return n + 1;
        if (!n) return ackermann(m - 1, 1);
        return ackermann(m - 1, ackermann(m, n - 1));
}
 
int main()
{
    int m, n;
    for (m = 0; m <= 3; m++)
        for (n = 0; n < 6 - m; n++)
            printf("A(%d, %d) = %d\n", m, n, ackermann(m, n));
    return 0;
}