main() {
    unsigned short a[N], i, j, f;
    srand(time(NULL));
    for (i=0; i<N; i++) {
        a[i] = rand() % 15;
        printf("%d ", a[i]);
    }
    printf("\n");
    for (i=0; i<N; i++) {
        f = 1;
        for (j=0; j<N; j++)
            if (a[i] == a[j] && i != j) {
                f = 0;
                break;
            }
        if (f == 1) printf("%d ", a[i]);
    }
    printf("\n");
}