/* prog5.3.c */
#include <stdio.h>
#include <stdlib.h>

int gcd(int m, int n)
  {
    if (n == 0) return m;
    return gcd(n, m % n);
  }  

int main(int argc, char *argv[])
{
  int m = atoi(argv[1]), n = atoi(argv[2]);
  printf("(%d, %d) = %d\n", m, n, gcd(m,n));
  return 0;
}