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#include <iostream>
#include <fstream>
using namespace std;
int test(int _n , int _m );
int main()
{
ifstream fisier_in("euclid2.in");
ofstream fisier_out("euclid2.out");
int t;
fisier_in >> t;
while(t != 0){
int a,b;
fisier_in >> a>>b;
fisier_out << test(a,b) << '\n';
t--;
}
return 0;
}
int test(int _n , int _m ){
if(_m == 0){
return _n;
}
return test(_m , _n%_m);
}