Cod sursa(job #1971302)

Utilizator Laura_CorneiLaura Maria Cornei Laura_Cornei Data 20 aprilie 2017 10:34:23
Problema Abc2 Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.73 kb
#include <stdint.h>
#include <fstream>
#include <string.h>
#define nmax 10000001
#define mmax 21
#define mod 666013
using namespace std;
fstream f1("abc2.in", ios::in);
fstream f2("abc2.out", ios::out);
char sir[nmax], cuv[mmax];
uint32_t n, nrt, rez;
int16_t m;
const int16_t d=3;
uint32_t ct;///=d^(m-1)
struct nod
{
    uint32_t val;
    nod * urm;
} *t[mod+2];
uint32_t hash_c()
{
    int16_t i;
    uint32_t h=0;
    for(i=0; i<m; i++)
        {
            h=h*d+(cuv[i]-'a');
        }
    return h;
}
uint32_t hash_s()
{
    int16_t i;
    uint32_t h=0;
    for(i=0; i<m; i++)
        {
            h=h*d+(sir[i]-'a');
        }
    return  h;
}
void putere()
{
    int16_t i;
    ct=1;
    for(i=1; i<m; i++)
        ct*=d;

     ct%=mod;
}
void adauga(uint32_t numar)
{
    nod *p= new nod;
    p->val=numar;
    p->urm = t[numar%mod];
    t[numar%mod]=p;
}
int16_t gaseste(uint32_t numar)
{
    nod*p;
    for(p=t[numar%mod]; p!=0; p=p->urm)
        if(p->val==numar) return 1;
    return 0;
}
int main()
{
    uint32_t numar, i;
    f1>>sir; n=strlen(sir);
    f1>>cuv; m=strlen(cuv);

    do
    {
        numar=hash_c();
        adauga(numar);///adaugi numar la lista t[numar%mod]

    }while(f1>>cuv);

    numar=hash_s();
    if(gaseste(numar)) rez++; ///daca gasesti numar la lista t[numar%mod]
    putere();///calc ct, care te ajuta sa faci trecerea intre secv textului lung

    for(i=1; i<=n-m; i++)
    {
        ///treci la urmatoarea secv modificand hashul pt val
        numar=  numar- ct*(sir[i-1]-'a');
        numar= (numar*d+ sir[i+m-1]-'a');
        if(gaseste(numar)) rez++; ///daca gasesti numar la lista t[numar%mod]
    }
    f2<<rez;
    return 0;
}