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#include <cstdio>

int n, sum, a;
int b = 1001;

int main() {
    scanf("%d",&n);
    for(int i = 0; i < n; ++i) {
        scanf("%d",&a);
        sum += a;
        if (a % 2 && b > a) {
            b = a;
        } 
    }
    if (sum % 2 == 0) {
        printf("%d\n", sum);
    }
    else {
        if(b != 1001 && n > 1) 
            printf("%d\n", sum - b);
        else {
            printf("NIESTETY\n");
        }
    }
}