void task10()
{
    struct Stack *beforeFirstPositive = NULL;

    if (L == NULL)
        return;

    run = L;
    while (run->next != NULL) {
        if (run->next->inf > 0) {
            beforeFirstPositive = run;
            break;
        }

        run = run->next;
    }

    if (!beforeFirstPositive)
        return;

    run = beforeFirstPositive->next;
    beforeFirstPositive->next = beforeFirstPositive->next->next;
    free(run);
}