????????4С???????????? ????????4???????????????? ????????4С???????????????
????????4С?????????????????????
??δ?????????????С?????
1??????????
??
2??????????
??
3????????С?????
16
4???????????????
5
5????????????·????????+18
9+16
6????????????·???????+18
9+16
7???????????????+15
13+14
8??????????
??
9?????????6???????
8*3
10?????(???)???????????+???????(3)+???????(2)
4+4*3+3*2
???????
144
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