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Cod sursa(job #100682)
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <set>
using namespace std;
string text;
vector<unsigned long> cs;
unsigned long p[21];
set<unsigned long> words;
void calc_cksum(int n) {
unsigned long c = 0;
int i(0);
unsigned long p = 1;
for (; i < n; ++i) {
c += (text[i] - 'a') * p;
p *= 3;
}
p /= 3;
cs.insert(cs.begin(), text.size() - n + 1, 0);
cs[0] = c;
for (; i < (int)text.size(); ++i) {
c /= 3;
c += p * (text[i] - 'a');
cs[i - n + 1] = c;
}
}
int main(int argc, char *argv[]) {
ifstream fin("abc2.in");
fin >> text;
bool notCalculated(true);
int tot(0);
do {
string aux;
fin >> aux;
if (!aux.empty()) {
if (notCalculated) {
calc_cksum(aux.size());
// for (int i(0); i < (int)cs.size(); ++i)
// cout << cs[i] << " ";
// cout << endl;
notCalculated = false;
p[0] = 1;
for (int i(1); i <= (int)aux.size(); ++i)
p[i] = p[i - 1] * 3;
}
unsigned long c = 0;
for (int i(0); i < (int)aux.size(); ++i)
c += (aux[i] - 'a') * p[i];
// cout << c << endl;
words.insert(c);
}
} while (!fin.eof());
fin.close();
for (int i(0); i < (int)cs.size(); ++i)
if (words.count(cs[i]))
++tot;
// for (int i(0); i < (int)cs.size(); ++i)
// if (c == cs[i]) {
// cs[i] = -1;
// ++tot;
// }
ofstream fout("abc2.out");
fout << tot << endl;
fout.close();
return 0;
}