hsy单词

题意：略

在ac自动机上，一个节点出现的次数等于能通过fail到它的节点的次数之和。而叶节点就等于它被爬过的次数。

#include <iostream>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cstring>
#include <map>
#include <queue>
#include <set>
#include <cassert>
#include <stack>
#include <bitset>
#define mkp make_pair
using namespace std;
const double EPS=1e-;
typedef long long lon;
const lon SZ=,SSZ=,APB=,one=,INF=0x7FFFFFFF,mod=;
int n,nex[SZ][APB],cnt,num[SZ];
int fail[SZ],match[SZ],in[SZ],ans[SZ];
char ch[SZ];
 
void build(int x)
{
    int cur=;
    for(int i=;ch[i];++i)
    {
        int c=ch[i]-'a';
        if(!nex[cur][c])nex[cur][c]=++cnt;
        cur=nex[cur][c];
        ++num[cur];
        //cout<<num[cur]<<endl;
    }
    match[x]=cur;
}
 
void build_fail()
{
    queue<int> q;
    q.push();
    for(;q.size();)
    {
        int fr=q.front();
        q.pop();
        for(int i=;i<APB;++i)
        {
            if(nex[fr][i])
            {
                int u=nex[fr][i];
                if(fr==)
                {
                    fail[u]=;
                }
                else
                {
                    int v=fail[fr];
                    for(;!nex[v][i]&&v;v=fail[v]);
                    if(nex[v][i])fail[u]=nex[v][i];
                    else fail[u]=;
                }
                q.push(u);
            }
        }
    }
}
 
void topo()
{
    for(int i=;i<=cnt;++i)
    {
        ++in[fail[i]];
    }
    stack<int> stk;
    for(int i=;i<=cnt;++i)
    {
        if(!in[i])
        {
            stk.push(i);
            //cout<<"i: "<<i<<endl;
        }
        ans[i]=num[i];
    }
    for(;stk.size();)
    {
        int top=stk.top();
        stk.pop();
        --in[fail[top]],ans[fail[top]]+=ans[top];
        if(!in[fail[top]])
        {
            stk.push(fail[top]);
        }
    }
}
 
void init()
{
    cin>>n;
    for(int i=;i<=n;++i)
    {
        cin>>ch+;
        build(i);
    }
    build_fail();
    topo();
    for(int i=;i<=n;++i)
    {
        cout<<ans[match[i]]<<endl;
    }
}
 
void work()
{
 
}
 
int main()
{
    std::ios::sync_with_stdio();
    //freopen("d:\\1.txt","r",stdin);
    int casenum;
    //cin>>casenum;
    //cout<<casenum<<endl;
    //for(int time=1;time<=casenum;++time)
    //for(int time=1;cin>>n>>qnum,n;++time)
    {
        //cout<<"Case "<<time<<": ";
        init();
        work();
    }
    return ;
}