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#include <iostream>
#include <fstream>
using namespace std;
void citire(int a,int b)
{
ifstream f("euclid2.in");
f>>a>>b;
f.close();
}
int euclid(int a,int b)
{
if(!b)return a;
euclid(b,a%b);
}
void afisare(int a, int b)
{
}
int main()
{
int a,b,n;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
f>>n;
for(int i=0;i<n;i++)
{
f>>a>>b;
if(a<b)swap(a,b);
g<<euclid(a,b);
}
g.close();
f.close();
return 0;
}