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