先贴,今天太晚,明天填坑。
题目描述太不良心了,误解了题意*n
#include<iostream>
#include<cstdio>
#include<cstring>
#define N 2000005
using namespace std;
int ch[N][26],pre[N],dis[N];
char a[N],b[N];
int sz=0,n,m,p,q,np,nq,now,last,S,ans=0,len=0;
void ins(int x){
p=last;np=++sz;last=sz;
dis[np]=dis[p]+1;
for(;p&&!ch[p][x];p=pre[p]) ch[p][x]=np;
if(!p) {pre[np]=S;return;}
q=ch[p][x];
if(dis[q]==dis[p]+1) pre[np]=q;
else{
nq=++sz;dis[nq]=dis[p]+1;
memcpy(ch[nq],ch[q],sizeof(ch[q]));
pre[nq]=pre[q];
pre[q]=pre[np]=nq;
for(;ch[p][x]==q;p=pre[p])ch[p][x]=nq;
}
}
void getans(int x){
if(ch[now][x]) len++,now=ch[now][x];
else{
while(now&&!ch[now][x]) now=pre[now];
if(now==0) now=S,len=0;
else len=dis[now]+1,now=ch[now][x];
}
printf("%d\n",len);
}
int main(){
freopen("in.txt","r",stdin);
freopen("out.txt","w",stdout);
scanf("%d %d\n",&n,&m);
scanf("%s\n%s\n",a,b);
now=last=S=++sz;
for(int i=0;i<n;i++) ins(a[i]-'a');
for(int i=0;i<m;i++) getans(b[i]-'a');
return 0;
}