#include <stdio.h>

int main(void)
{
  int m, n, rem;

  printf("Enter two numbers consecutively(with a space between them): ");
  scanf("%d %d", &m, &n);

  while (m)
  {
  rem = m;
  m = n % rem;
  n = rem;
  }

  printf("%d is the GCD\n", n);

  return 0;
}