Cod sursa(job #1654237)

Utilizator CalarisPredut Denis Stefanita Calaris Data 16 martie 2016 21:51:51
Problema Abc2 Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.39 kb
#include <fstream>
#include <vector>
#include <string.h>
#include <iostream>

using namespace std;

const int MAX = 666013;

vector<unsigned int> hashTable[MAX+70];
int length=0;
int ans = 0;

vector<unsigned int>::iterator operation_search(unsigned int number,unsigned int index)
{
    vector<unsigned int>::iterator it;

    for(it = hashTable[index].begin(); it != hashTable[index].end(); ++it)
        if (*it == number)
            return it;

    return hashTable[index].end();
}

void operation_add(string word)
{
    int i;
    unsigned int index = 0;
    for(i=0;i<length;++i)
        index=(index*3)+(word[i]-'a');

     if(operation_search(index,index%MAX)==hashTable[index%MAX].end())
        hashTable[index%MAX].push_back(index);
}

int main()
{
    fstream f("abc2.in",ios::in);
    ofstream g("abc2.out");

    string text,word,temp;
    int length2,i,j;
    unsigned int index=0;
    f>>text;

    while(f>>word)
        {
        if(!length)length=word.length();
        operation_add(word);
        }

    length2=text.length()-length+1;

    for(i=0;i<length2;++i)
        {

         for(j=i;j<i+length;++j)
             index=(index*3)+(text[j]-'a');

         if(operation_search(index,index%MAX)!=hashTable[index%MAX].end())
            {
                ++ans;
            }

         index=0;
        }

    g<<ans;
    return 0;
}