#include <iostream>
using namespace std;
int main()
{
int n,aux=0,x,i;
cin>>n;
for(i=1;i<=n;i++)
{
cin>>x;
if(x>aux && x%2==0)
aux=x;
}
cout<<aux;
return 0;
}
#include <iostream>
using namespace std;
int main()
{
long long int n,s=0;
cin>>n;
while(n)
{
if(n%10%2==1)
s+=n%10;
n/=10;
}
cout<<s;
return 0;
}