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#include <iostream>


using namespace std;


int nmin;
long long suma;

bool nb=false;

int main()
{
    ios_base::sync_with_stdio(0);
    int n, we;
    cin>>n;

    if(n==1)
    {
        cin>>we;
        if(we%2==0) cout<<we;
        else cout<<"NIESTETY";
        return 0;
    }

    for(int i=0; i<n; i++)
    {
        //cout<<"[]"<<nmin<<endl;
        cin>>we;
        suma+=we;

        if(we%2==1)
        {
            if(nb)
            {
                if(we<nmin) nmin=we;
            }
            else
            {
                nmin=we;
                nb=true;
            }
        }

    }

    if(suma%2==1) cout<<suma-nmin;
    else cout<<suma;
    return 0;
}