USACO 1.1 - Your Ride Is Here

The easiest problem in USACO training.

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

using namespace std;

int main() {
  ofstream fout("ride.out");
  ifstream fin("ride.in");

  string comet, group;
  getline(fin, comet);
  getline(fin, group);

  long long valComet = 1;
  long long valGroup = 1;

  for (char &c : comet)
    valComet *= (c - 'A' + 1);
  valComet %= 47;

  for (char &c : group)
    valGroup *= (c - 'A' + 1);
  valGroup %= 47;

  if (valComet == valGroup)
    fout << "GO" << endl;
  else
    fout << "STAY" << endl;

  return 0;
}