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//Mateusz Pabian Jagiellonian University
#include <iostream>
using namespace std;

long long n,x,suma=0,minimum=1001;

int main()

{
    ios_base::sync_with_stdio(0);
    cin >>n;
    for (int i=0;i<n;i++)  
    {
        cin >>x;
        if (x%2==1 && x<minimum) minimum=x;
        suma=suma+x;
    }
    if (minimum==1001) minimum=0;
    if (suma%2==0)
    {
        if (suma>0)cout <<suma<<endl;
        else cout <<"NIESTETY"<<endl;
    }
    else
    {
        suma=suma-minimum;
        if (suma==0 || suma%2==1) cout <<"NIESTETY"<<endl;
        else cout <<suma<<endl;
        
    }
    

    return 0;
}