tj

#include <bits/stdc++.h>
using namespace std;
int main () {
long long a, b, c;
cin >> a >> b >> c;
for (long long i = 2;i <= 9999999999999999;i++) {
if (a % i == b % i && b % i == c % i) {
cout << i;
return 0;
}
}
return 0;
}