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#include <bits/stdc++.h>
using namespace std;
int main(){
int n;
cin >> n;
int a[n + 10];
for(int i = 1;i <=n;i++){
cin >> a[i];
}
int mx = a[1];
for(int i = 1;i <= n;i++){
if(a[i] > mx) mx = a[i];
}

int ans = 1;
int sum = 0;
for(int i = 1;i <= mx;i++){
    for(int j = 1;j <= n;j++){
        if(a[j] % i == 0){
            sum++;
        }
    }
    if(sum == n){
        ans = i;
    }
    sum = 0;
}
cout <<ans;
return 0;

}