#include <bits/stdc++.h>
using namespace std;
int main() {
   int x,y,z;
   cin>>x>>y>>z;
   if(x%2 == 0 && y%2==0){
       cout<<x<<endl;
   }
   else if(y%2 == 0 && z%2==0){
       cout<<y<<endl;
   }
   else{
       cout<<z<<endl;
   }

    return 0;
}