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#include <iostream>

using namespace std;

int main()
{
    int ile;
    cin>>ile;
    int tab[ile];
    int pomoc = 1000001;
    long long int suma=0;
    for (int i=0; i<ile; i++)
    {
        cin>>tab[i];
        suma=suma+tab[i];
    }
    if (suma%2==0)
    {
        cout<<suma;
    }
    else if (suma%2!=0)
    {
        for (int i=0; i<ile; i++)
        {
            if (tab[i]%2!=0 && tab[i]<pomoc)
            {
                pomoc=tab[i];
            }
        }
        if (pomoc!=1000001 && (suma-pomoc)%2==0 && suma-pomoc!=0)
        {
            suma=suma-pomoc;
            cout<<suma;
        }
        else
        {
            cout<<"NIESTETY";
        }
    }
    return 0;
}