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#include <stdio.h>

int main() 
{
    unsigned long int n;
    unsigned long int temp;
    unsigned long int min_odd = 10000;
    unsigned long int no_of_odd = 0;
    unsigned long int sum = 0;
    unsigned long int i;
    
    scanf("%ld", &n);
    
    if(n == 1)
    {
        scanf("%ld", &temp);
        if(temp % 2 != 0)
        {
            printf("NIESTETY");
        }
        else
        {
            printf("%ld", temp);
        }
    }
    else
    {
        for(i = 0; i < n; ++i)
        {
            scanf("%ld", &temp);
            sum = sum + temp;
            if(temp % 2 != 0)
            {
                no_of_odd++; 
                if(temp < min_odd)
                {
                    min_odd = temp;  
                }
            }
        }

        if(min_odd == 10000 || no_of_odd % 2 == 0)
        {
            printf("%ld", sum); 
        }
        else
        {
            printf("%ld", sum - min_odd);   
        }
    }
    
    return 0;
}