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Cod sursa(job #861132)
#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <math.h>
#include <map>
#include <stdlib.h>
#include <sstream>
#include <stdio.h>
#define PI 3.1415926535897932384626433832795
using namespace std;
int main() {
int t;
cin >> t;
for (int w = 0; w < t; ++w){
int a,b;
cin >> a >> b;
if (a < b) {
swap(a,b);
}
int p;
while (b > 0) {
p = a%b;
a = b;
b = p;
}
cout << a;
}
return 0;
}