Cod sursa(job #1727340)

Utilizator cristina_borzaCristina Borza cristina_borza Data 10 iulie 2016 16:20:51
Problema Abc2 Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.02 kb
#include <fstream>
#include <cstring>
#include <set>
#include <map>

#define MOD 666013
#define BASE 3

using namespace std;

ifstream f("abc2.in");
ofstream g("abc2.out");

char cuv[50] , prop[10000005];
unsigned int n , m , nr;

bool mp[1500000];

int main() {
    f >> prop;
    m = strlen(prop);

    while (f >> cuv) {
        unsigned int hash1 = 0;
        n = strlen(cuv);

        for (int i = 0; i < n; ++i) {
            hash1 = (hash1 * BASE + (cuv[i] - 'a')) % MOD;
        }

        mp[hash1] = 1;
    }

    unsigned int P1 = 1, hash1 = 0;
    for (int i = 0; i < n; ++i) {
        hash1 = (hash1 * BASE + (prop[i] - 'a')) % MOD;
        if (i) {
            P1 = (BASE * P1) % MOD;
        }
    }

    if (mp[hash1] == 1) {
       ++nr;
    }

    for (int i = n; i < m; ++i) {
        hash1 = ((hash1 - ((prop[i - n] - 'a') * P1) % MOD + MOD) * BASE + (prop[i] - 'a')) % MOD;

        if (mp[hash1] == 1) {
            ++nr;
        }
    }

    g << nr;
    return 0;
}