My USACO solutions

USACO_1_1_1_ride.cpp

/*
ID: yilin.g1
PROG: ride
LANG: C++
*/

/*
Your Ride Is Here
http://train.usaco.org/usacoprob2?a=1riZcYaDeJF&S=ride
*/

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int main() {
    ofstream fout ("ride.out");
    ifstream fin ("ride.in");
    string s1, s2, mission;
	fin >> s1 >> s2;
	long long n1 = 1, n2 = 1;
	for (int i = 0; i < s1.length(); ++i) {
		n1 *= static_cast<long long>(s1[i] - 'A' + 1);
	}
	for (int i = 0; i < s2.length(); ++i) {
		n2 *= static_cast<long long>(s2[i] - 'A' + 1);
	}
	mission = (n1 % 47 == n2 % 47) ? "GO" : "STAY";
	fout << mission << endl;
    return 0;
}