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#include <iostream>

int main(int argc, char** argv) {
	
	int n;
	int a;
	
	int suma = 0;
	int np = 2000;
	
	
	scanf("%d", &n);
		
	while(n--)
	{
		scanf("%d", &a);
		
		suma += a;
		
		if( (a % 2) && a < np)
			np = a;
	}
	
	if( suma % 2 == 0 )
		printf("%d\n", suma);
	else
	{
		suma -= np;
		
		if( suma > 0)
		{
			printf("%d\n", suma);
		}
		else
		{
			printf("NIESTETY\n");
		}
	}
		
	return 0;
}