#include<fstream>

using namespace std;

ifstream fin("1.in");
ofstream fout("1.out");

int main()
{
    int v[100],n,max=-9999;
    
    fin>>n;
    for(int i=0;i<n;i++) fin>>v[i];
    
    for(int i=0;i<n;i++)
      if(v[i]%2==0)
          if(v[i]>max) max=v[i];
          
    fout<<max;
    
    fin.close();
    fout.close();
    
    return 0;
    
}