P3879 [TJOI2010]阅读理解

P3879 [TJOI2010]阅读理解
做法1:map+vector(直接看代码，不解释)
做法2:trie树,在每个单词的末尾标记上是属于哪个文章的就可以了

#include <iostream>
#include <cstdio>
#include <queue>
#include <algorithm>
#include <map>
#include <cstring>
#define inf 2147483647
#define N 1000010
#define p(a) putchar(a)
#define For(i,a,b) for(int i=a;i<=b;++i)
//by war
//2019.8.12
using namespace std;
int n,m,q,t;
string s;

map<string,vector<int> >a;

void in(int &x){
    int y=1;char c=getchar();x=0;
    while(c<'0'||c>'9'){if(c=='-')y=-1;c=getchar();}
    while(c<='9'&&c>='0'){ x=(x<<1)+(x<<3)+c-'0';c=getchar();}
    x*=y;
}
void o(int x){
    if(x<0){p('-');x=-x;}
    if(x>9)o(x/10);
    p(x%10+'0');
}

signed main(){
    in(n);
    For(i,1,n){
        in(m);
        For(j,1,m){
            cin>>s;
            a[s].push_back(i);
        }
    }
    in(q);
    For(ii,1,q){
        cin>>s;
        t=a[s].size()-1;
        For(i,0,t)
            if(i==0||a[s][i]!=a[s][i-1]){
                if(i!=0) p(' ');
                o(a[s][i]);
            }
        p('\n');
    }
    return 0;
}

 

 

#include<iostream>
#include<cstdio>
#include<queue>
#include<algorithm>
#include<cmath>
#include<bitset>
#include<set>
#include<map>
#include<stack>
#include<cstring>
#pragma GCC optimize(2)
#define inf 2147483647
#define ls rt<<1
#define rs rt<<1|1
#define lson ls,nl,mid,l,r
#define rson rs,mid+1,nr,l,r
#define N 1000010
#define For(i,a,b) for(int i=a;i<=b;++i)
#define p(a) putchar(a)
#define g() getchar()
//by war
//2019.8.12
using namespace std;
int n,m,q,cnt;
char s[1010];
bool flag;
bitset<1001> b[500007];

void in(int &x){
    int y=1;char c=g();x=0;
    while(c<'0'||c>'9'){if(c=='-')y=-1;c=g();}
    while(c<='9'&&c>='0'){ x=(x<<1)+(x<<3)+c-'0';c=g();}
    x*=y;
}
void o(int x){
    if(x<0){p('-');x=-x;}
    if(x>9)o(x/10);
    p(x%10+'0');
}

namespace AC{
    int tr[N][26],tot;
    int fail[N];
    void insert(char *s,int id){
        int u=0;
        for(int i=1;s[i];i++){
            if(!tr[u][s[i]-'a']) tr[u][s[i]-'a']=++tot;
            u=tr[u][s[i]-'a'];
        }
        b[u][id]=1;
    }
    void query(char *t){
        int u=0,flag=0;
        for(int i=1;t[i];i++){  
            if(t[i]<'a'||!tr[u][t[i]-'a']){
                flag=1;
                break;
            }               
            u=tr[u][t[i]-'a'];
        }
        if(!flag)
            For(i,1,n)
                if(b[u][i]){
                    o(i);p(' ');
                }
        p('\n');
    }
}

int main(){
    in(n);
    For(i,1,n){
        in(m);
        For(j,1,m){
            scanf("%s",s+1);
            AC::insert(s,i);
        }
    }
    in(q);
    For(i,1,q){
        scanf("%s",s+1);
        AC::query(s);
    }
    return 0;
}