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#include <iostream>

using namespace std;
int n, pom, min_nieparz = 100000000;
long long int suma = 0;

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

    for(int i = 0; i < n; i++) {
        cin >> pom;
        suma += pom;
        if(pom%2 == 1 && min_nieparz > pom) min_nieparz = pom;
    }

    if(suma%2 == 0) cout << suma;
    else {
        suma -= min_nieparz;
        if(suma > 0) cout << suma;
        else cout << "NIESTETY";
    }

    return 0;
}