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#include <cstdio>
#include <iostream>
using namespace std;
int main(){
	int n;
	scanf("%d", &n);
	long long suma = 0;
	int minnp = 1 << 30,licz = 0;
	for (int i = 0; i < n; i++){
		int a;
		scanf("%d", &a);
		suma += a;
		if (a % 2 == 1){
			minnp = min(a,minnp);
			licz++;
		}
	}
	if (n == 1 && suma % 2 == 1){
		printf("NIESTETY");
		return 0;
	}

	if (licz % 2 == 1)
		suma -= minnp;
	printf("%lld", suma);
}