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#include <iostream>
using namespace std;

int main()
{
ios_base::sync_with_stdio(0);
unsigned long long a, b, c, d;
a=b=c=d=0;
cin >> a;
for (unsigned long long i=0; i<a; i++)
{
    cin >> b;
    c+=b;
    if (b%2==1 && (b<d || d==0)) d=b;
}

if (c%2==0) cout << c << endl;
else if (c-d==0) cout << "NIESTETY" << endl;
else cout << c-d << endl;
}