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#include<cstdio>
using namespace std;
long long int tab[1000006];
int main()
{
	long long int najw_np = 10000;
	int n;
	scanf("%d", &n);
	long long int suma = 0;
	for(int i = 0; i < n; i++)
	{
		long long int tmp;
		scanf("%lld", &tmp);
		suma = suma + tmp;
		if(tmp %2 == 1)
		{
			if(najw_np > tmp)
				najw_np = tmp;
		}
	}
	if(suma%2 == 1)
	{
		suma -= najw_np;
	}
	if(suma == 0)
	{
		printf("NIESTETY\n");
	}
	else
	{
		printf("%lld\n", suma);
	}
}