??????????????
??????????????
???????????
????Ч??????
14.???2?12??→13??
????????????????≥14??
???????≥3??
???2??????С???≥13??
??????1????????3??13??????
??????????????
??????????????
???????????
????Ч??????
15.???2?14??→15??
????????????????≥15??
???????≥3??
???2??????С???≥14??
??????1????????3??14??????
??????????????
??????????????
???????????
????Ч???????3????????????????+1
???2????????????+1
16.???2?15??→16??
????????????????≥16??
???????≥4??
????????????????????????????????????????40407???????40407????????
