标签:line bst parent com void def inline longest nts
求不同子串数量
统计每个点有效的字符串数量(第一次出现的)
\(\sum\limits_{now=1}^{nod}now.longest-parents.longest\)
#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
const LL maxn=3000;
LL nod,last,n,T;
LL len[maxn],fail[maxn],son[maxn][26];
char s[maxn];
inline void Insert(LL c){
LL np=++nod,p=last;
len[np]=len[p]+1;
last=np;
while(p&&!son[p][c]){
son[p][c]=np,
p=fail[p];
}
if(!p)
fail[np]=1;
else{
LL q=son[p][c];
if(len[q]==len[p]+1)
fail[np]=q;
else{
LL nq=++nod;
len[nq]=len[p]+1;
fail[nq]=fail[q];
memcpy(son[nq],son[q],sizeof(son[q]));
fail[np]=fail[q]=nq;
while(p&&son[p][c]==q){
son[p][c]=nq,
p=fail[p];
}
}
}
}
int main(){
scanf("%lld",&T);
while(T--){
memset(son,0,sizeof(son));
nod=last=1;
scanf(" %s",s);
for(LL i=0;i<strlen(s);++i)
Insert(s[i]-'A');
LL ans=0;
for(LL i=1;i<=nod;++i)
ans+=len[i]-len[fail[i]];
printf("%lld\n",ans);
}
return 0;
}
标签:line bst parent com void def inline longest nts
原文地址:https://www.cnblogs.com/y2823774827y/p/10199804.html