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#include <stdio.h>

int main() {
    int N, sum = 0, min, tmp = -1;
    scanf("%d", &N);
    for (int i=0; i<N; i++) {
        scanf("%d", &tmp);
        if (tmp%2==1 && (min<-1 || tmp<min)) min = tmp;
        sum += tmp;
    }
    
    if (sum % 2 == 1) {
        if (min < 0 || N==1) {
            printf("NIESTETY");
            return 0;
        }
        sum -= min; 
    }
    
    printf("%d", sum);
    return 0;
}