bool is_unique(int *arr, size_t size, size_t orig_idx) {
    for (size_t i = 0, i < size; ++i) {
        if (orig_idx != i && arr[orig_idx] == arr[i])
            return false;
        }
    }
}



void print_unique(int *arr, size_t size) {
    for (size_t i = 0; i < size; ++i) {
        if (is_unique(arr, size, i)) {
            std::cout << arr[i] << ' ';
        }
    }
}