#include <bits/stdc++.h>
using namespace std;
int main(){
    int kkksc03,noip,UKE,x;
    cin>>kkksc03>>noip>>UKE;
    for(int i=1;i<=100000000000000000000000000000000000;i++){
        if(kkksc03%i==noip%i==UKE%i){
            x=i;
            break;
        }
    }
    cout<<x;
    return 0;
}