#include<bits/stdc++.h> using namespace std; int main() { int a,b,c,a1,b1,c1,x=2; cin>>a>>b>>c; while(1) {a1=a%x; b1=b%x; c1=c%x;
if(a1b1&&a1c1){cout<<x;break;} x++; } return 0; }