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Re:猪胃,度娘是女人,不可轻信!!

Posted by Sigma_Poet at 2015-08-05 21:21:57 on Problem 2406
In Reply To:猪胃,度娘是女人,不可轻信!! Posted by:kill_myself at 2013-05-27 22:56:05
> 一直以来KMP我都是照抄百科的模板,一直所向披靡!
> 此时,我终于知道抄模板是要付出代价的!
> 谁知道查了一万遍原来是getnext()错了!
> inline void NEXT(conststring& T,vector<int>& next)
> {
> //按模式串生成vector,next(T.size())
> next[0]=-1;
> for(int i=1;i<T.size();i++){
> int j=next[i-1];
> while(T[i]!=T[j+1]&& j>=0)
> j=next[j] ; //递推计算
> if(T[i]==T[j+1])next[i]=j+1;
> else next[i]=0; //!!!!就这句坑爹
> }
> }
> 介是哪位坑爹选手的代码啊!!!
> 乍一看,最后一行next[i]=0;不是废话么!
> 最后才知道个中玄机留待众爹揣摩!
> 这些代码就没有啥专业人员审核么!

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