Cod sursa(job #2637714)

Utilizator PopescuAndreiAlexandruPopescu Andrei Alexandru PopescuAndreiAlexandru Data 24 iulie 2020 13:56:26
Problema NFA Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.39 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <cstring>

using namespace std;

ifstream fin("nfa.in");
ofstream fout("nfa.out");

const int DIM = 305;

int n,m,k,start,F[DIM],x,y,q,C[DIM][DIM],ans;

char c;

vector < pair <int,char> > G[DIM];

string Text;

void Read()
{
    fin>>n>>m>>k;
    fin>>start;
    while(k--)
    {
        fin>>x;
        F[x]=1;
    }
    while(m--)
    {
        fin>>x>>y>>c;
        G[x].push_back(make_pair(y,c));
    }
}

void DFS(int node, string Str, int pos)
{
    if(pos==(Str.size()))
    {
        if(F[node])
        {
            ans=1;
            return;
        }
    }
    else
    {
        vector < pair <int,char> > ::iterator it;
        for(it=G[node].begin();it!=G[node].end();it++)
        {
            int next=(*it).first;
            char ch=(*it).second;
            if(!C[next][pos] && ch==Str[pos])
            {
                C[next][pos]=1;
                DFS(next,Str,pos+1);
            }
        }
    }
}

void SolveEvent(string Str, int pos)
{
    ans=0;
    for(int i=1;i<=n;i++)
        for(int j=0;j<=151;j++)
            C[i][j]=0;
    DFS(start,Str,pos);
    fout<<ans<<'\n';
}

void Query()
{
    fin>>q;
    while(q--)
    {
        fin>>Text;
        SolveEvent(Text,0);
    }
}

int main()
{
    Read();
    Query();
}