Derinhelm

Cls_parents, Calc_linear = {}, {}

def not_in_tail(elem, queue):
    return elem == queue[0] or elem not in queue #или в начале очереди, или не стоит в ней

def create_queues(parents):
    if not parents: return []
    queues = []
    for parent in parents:
        new_queue = Calc_linear[parent].copy()