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#include <stdio.h>
using namespace std;

int n;
int banknot;
int nominaly[1001];
int suma_portfel = 0;

int main()
{
	scanf("%d", &n);
	
	for(int i = 0; i < n; i++)
	{
		scanf("%d", &banknot);
		nominaly[banknot]++;
		
		suma_portfel += banknot;
	}
	
	if(suma_portfel%2 == 0) printf("%d\n", suma_portfel);
	else
	{
		for(int i = 1; ; i += 2)
		{
			if(nominaly[i] > 0) { suma_portfel -= i; break; }
		}
		
		if(suma_portfel > 0) printf("%d\n", suma_portfel);
		else printf("NIESTETY\n");
	}
	
	return 0;
}