^ĵһ^cM^ζꡢLȵ̎һеDcڅ½pf_ʼķïLڅʒ졣
ﲢʹ˽YСһ֮fľ_ʼYӣի@ļgһNfǞ顰ϻָڻ؟⣬˕rйI߀x_{ʹáFAa{ďS҅R{̖Ҳ^࣬ô҂ԓЩxmԼķ{
ȣҪ_һc{MƷIҪʹõԱMԼČHxrλ^ߵĮaƷһփrXһ؛ǰyIһ˵Ď״Ʒ߀ҪrrMоS|߀̝XĽ
{mÈԏ@ǶȳlxΣUij̶x{PҎ҂˽ΣUɄ֞0^1 ^2^
(a) 0^ըԚwhBmFLrgڵĈ
(b) 1^\ЕrܳFըԚwhĈ
(c) 2^\ЕrܳFըԚwhFҲżl҃HǶ̕rgڵĈ
ٴ҂Ҫ_{eY£úV늚O úVըԚwh ͡d 늚O䰴ԇȫg϶|ȫ͡i늚O䰴Сȼַ֞ABCBʹ÷VֻКȲҪʹâC
҂Ҫ_{ĜضȗlҪ֞߱ضȺȼض
߱ضָ늚OSl\Еr܇ըԭhcȼκβֻߜض
ȼضָȼԚwc՚γɵĻҎl±ȼ͜ضȡ
ُ֮Ir҂߀Ҫ]ԃrȣȼԼһЩԻĶĿԔҪҪNˆTһöףԸҶIăxķ{PI}ϵ҂őny