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#include <iostream>

using namespace std;

#define ULL unsigned long long

int main() {
	int n;
	cin >> n;
	int tab[n];
	for (int i=0; i!=n; ++i)
		cin >> tab[i];
	ULL tmp = 0;
	for (int i=0; i!=n; ++i)
		tmp += tab[i];
	
	int m = -1;
	for (int i=0; i!=n; ++i) {
		if (tab[i] % 2 == 1) {
			if (m == -1 || tab[i] < m)
				m = tab[i];
		}
	}
	
	if (tmp % 2 == 0)
		cout << tmp;
	else {
		if (m == -1 || n == 1)
			cout << "NIESTETY";
		else
			cout << tmp - m;
	}
	
	return 0;
}