Денис

List *delSpaces(List *p) {
    while (p && p->c == ' ')
    {
        p = p->next;
    }

    struct L *head = p;
    struct L *prev = p;
    p = p->next;

    while (p) 
    {
        if (p->c == ' ') 
        {
            prev->next = p->next;
        }
        else 
        {
            prev = p;
        }

        p = p->next;
    }

    return head;
}