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#include <cstdio>

#define MIN 99999

int sum = 0, min = MIN, n, x;
int main()
{
    scanf("%d", &n);
    for (int i=0; i<n; i++) {
        scanf("%d", &x);
        sum += x;
        if (x%2 && min>x) min = x;
    }

    if (sum%2 && min!=MIN) sum -= min;
    if (sum%2==0 && sum>0) printf("%d\n", sum);
    else printf("NIESTETY\n");
}