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#include<iostream>
#include<fstream>
#include<math.h>
using namespace std;
ifstream f("euclid2.in");
ofstream fout("euclid2.out");
int cmmdc(int a, int b)
{
int r,m;
m=a;
if(b>0)
{
r=a%b;
a=b;
b=r;
}
if(a%m==0 && b%m==0)
return a;
}
int main()
{
int T, a[100],i,ok=0,j;
f>>T;
for(i=1; i<=T*2; i++)
{
f>>a[i];
}
for(i=1; i<=T*2; i=i+2)
{
fout<<cmmdc(a[i],a[i+1])<<" ";
}
}