#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c,x=2; cin>>a>>b>>c; for (int i=2;i<=a;i++){ for (int j=2;j<=b;j++){ for (int x=2;x<=c;x++){ int n1=a%x,n2=b%x,n3=c%x; if (n1==n2 && n2==n3){ cout<<x<<'\n'; return 0; } } } } return 0; }