// euclid.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <fstream>
using namespace std;

ifstream f;
ofstream g("euclid2.out");

int main()
{
    f.open("euclid2.in");
    int n,a, b;
    f >> n;
    for (int i = 0; i < n; i++)
    {
        f >> a >> b;
        while (a != b)
        {
            if (a > b)a = a - b;
            else b = b - a;
        }
        g << a << "\n";
    }

    
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file