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#include <cstdio>
using namespace std;

int main() {
    int n;
    scanf("%d",&n);

    int min_np = 1001;
    long long suma = 0LL;

    int a;
    for (int i=0;i<n;++i) {
        scanf("%d",&a);
        suma += a;
        if (a<min_np && (a&1)) min_np=a;
    }
    if (suma%2==0) printf("%lld\n",suma);
    else {
        if (suma>min_np) printf("%lld\n",suma-min_np);
        else printf("NIESTETY\n");
    }
    
    return 0;
}