??????????~~~~
????????60???????????????????????……???15??????????????
????
??????
????=60*k+2*w-k
w????????????? ????????
С??????????????? ??????????????1 ?????????????????????? ??k=0.5 ???????? 3/10?????? k=0.3 ??????????
???磺???????????4/5?????? ??k=0.8 ???С????? 2.3 ??w= ??-2.3??
??????????????=60*0.8-4.6-0.8=48-5.4=42.6 ????????Χ???? 41~44???????????~~~~