Cod sursa(job #2439447)

Utilizator MortemPlaiasu Iulia-Silvia Mortem Data 16 iulie 2019 00:56:12
Problema Aho-Corasick Scor 95
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.69 kb
#include <iostream>
#include <fstream>
#include <queue>
#include <list>
using namespace std;

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

struct nod
{
  std::list<int> id;
  nod* back;
  nod* son['z'-'a'+1]={0};
};

char c[1005000];
char v[150][10500];
int countt[150];
nod * root;
std::queue<nod *> q;
int n,l;
char clear[10];
std::list<int> s;

int main()
{
  fin.getline(c,1005000);
  fin>>n;
  fin.getline(clear,10);
  root= new nod;
  root->back= root;
  for(int i=0;i<n;i++)
  {
    fin.getline(v[i],10500);
    nod * nd= root;
    for(int j=0;v[i][j]!='\0';j++)
    {
      char ch= v[i][j];
      if(nd->son[ch-'a']==0)
        nd->son[ch-'a']=new nod;
      if(nd==root)
        nd->son[ch-'a']->back=root;
      nd= nd->son[ch-'a'];
      if(v[i][j+1]=='\0')
        nd->id.push_back(i);
    }
  }
  for(int i=0;i<='z'-'a';i++)
    if(root->son[i]!=0)
      q.push(root->son[i]);
  while(!q.empty())
  {
    nod * tp= q.front();
    q.pop();
    for(int i=0;i<='z'-'a';i++)
    {
      nod * u = tp->son[i];
      if(u!=0)
      {
        q.push(u);
        nod * nd= tp->back;
        while( nd!=root &&nd->son[i]==0)
          nd= nd->back;
        if(nd->son[i]==0)
        {
          u->back=root;
          continue;
        }
        u->back= nd->son[i];
        s = u->back->id;
        u->id.merge(u->back->id);
        u->back->id=s;
      }
    }
  }
  nod * nd= root;
  for(int i=0;c[i]!='\0';i++)
  {
    int ch = c[i]-'a';
    while(nd->son[ch]==0 && nd!=root) nd= nd->back;
    if(nd->son[ch]==0) continue;
    nd=nd->son[ch];
    for(std::list<int>::iterator it = nd->id.begin(); it!=nd->id.end();++it)
      countt[(*it)]++;
  }//*/
  for(int i=0;i<n;i++)
    fout<<countt[i]<<"\n";
}