题解

#include<bits/stdc++.h>
using namespace std;

int main(){
    int n,a,b,c,d;
    cin >> n;
    while(n--){
        cin >> a >> b >> c >> d;
        int m = min(a,(min(b,(min(c,d)))));
        int gcd = 1;
        for(int i = 1;i <= m;i++){
            if(a % i == 0 && b % i == 0 && c % i == 0 && d % i == 0){
                gcd = i;
            }
        }
        cout << gcd << endl;
    }
    return 0;
}