C :

#include<stdio.h>
#include<string.h>
int main()
{
    char a[1000],b[1000];
    int i,l1,l2,x,y,p,q;
    while(scanf("%s%s",a,b)!=EOF)
    {
        x=1;
        y=1;
        l1=strlen(a);
        l2=strlen(b);
        for(i=0;i<l1;i++)
        {
            p=a[i]-64;
            x*=p;
        }
        for(i=0;i<l2;i++)
        {
            q=b[i]-64;
            y*=q;
        }
        if(x%47==y%47)
        printf("GO\n");
        else
        printf("STAY\n");
    }
    return 0;
}

C++ :

#include <iostream>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <string>
 
using namespace std;
 
const
	int MAXN = 1010;
int
	a[MAXN], b[MAXN], n1, n2;
string
	x,y;
 
int main()
{
	//freopen("ride.in","r",stdin);
//	freopen("ride.out","w",stdout);
 
	while(cin >> x)
    {
	cin >> y;
      char
		ch;
	int
		i, ans1 = 1, ans2 = 1;
	n1 = x.length();
	n2 = y.length();
	for (int i = 0; i <= n1-1; i++)
		ans1 *= int(x[i]) - 64;
	for (int i = 0; i <= n2-1; i++)
		ans2 *= int(y[i]) - 64;
	ans1 %= 47;
	ans2 %= 47;
	if (ans1 == ans2)
		cout << "GO" << endl;
	else
		cout << "STAY" << endl;
    }
	return 0;
}