Question

Answer 1

#include <iostream>
#include <fstream>

int gcd(int a, int b) {
    return (b == 0) ? a : gcd(b, a % b);
}

void printToFile(int tu, int mau) {
    std::ofstream outFile("cong.out");
    outFile << tu << " " << mau << std::endl;
    outFile.close();
}

int main() {
    std::ifstream inFile("cong.inp");
    int tu, mau, c, d;
    inFile >> tu >> mau;

    while (inFile >> c >> d) {
        int tuMoi = (mau == d) ? (tu + c) : (tu * d + c * mau);
        int mauMoi = mau * d;

        int ucln = gcd(tuMoi, mauMoi);
        tu = tuMoi / ucln;
        mau = mauMoi / ucln;
    }

    inFile.close();

    printToFile(tu, mau);

    return 0;
}