枚举和求最大公约数都是0ms  ；

#include <stdio.h>
main () 
{
    int a, b , i, t ;
    while (scanf ("%d%d", &a, &b) != -1){
        printf ("%10d%10d", a, b) ;
        t = a <b ? a : b ;
        for (i = 2; i <= t; i ++ ) if (a % i == 0 && b % i == 0) break ;  
        if (i > t) printf ("    Good Choice\n\n") ;
        else printf ("    Bad Choice\n\n") ;}
}