Ядро поисковой системы

RobertDeMilo

Oct 21st, 2023

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#include <algorithm>
#include <iostream>
#include <set>
#include <string>
#include <utility>
#include <vector>
using namespace std;
string ReadLine() {
string s;
getline(cin, s);
return s;
}
int ReadLineWithNumber() {
int result = 0;
cin >> result;
ReadLine();
return result;
}
vector<string> SplitIntoWords(const string& text) {
vector<string> words;
string word;
for (const char c : text) {
if (c == ' ') {
if (!word.empty()) {
words.push_back(word);
word.clear();
}
} else {
word += c;
}
}
if (!word.empty()) {
words.push_back(word);
}
return words;
}
set<string> ParseStopWords(const string& text) {
set<string> stop_words;
for (const string& word : SplitIntoWords(text)) {
stop_words.insert(word);
}
return stop_words;
}
vector<string> SplitIntoWordsNoStop(const string& text, const set<string>& stop_words) {
vector<string> words;
for (const string& word : SplitIntoWords(text)) {
if (stop_words.count(word) == 0) {
words.push_back(word);
}
}
return words;
}
void AddDocument(vector<vector<string>>& documents, const set<string>& stop_words,
const string& document) {
const vector<string> words = SplitIntoWordsNoStop(document, stop_words);
documents.push_back(words);
}
set<string> ParseQuery(const string& text, const set<string>& stop_words) {
set<string> query_words;
for (const string& word : SplitIntoWordsNoStop(text, stop_words)) {
query_words.insert(word);
}
return query_words;
}
bool MatchDocument(const vector<string>& document_words, const set<string>& query_words) {
for (const string& word : document_words) {
if (query_words.count(word) != 0) {
return true;
}
}
return false;
}
// Для каждого найденного документа возвращает его id
vector<int> FindDocuments(const vector<vector<string>>& documents, const set<string>& stop_words,
const string& query) {
const set<string> query_words = ParseQuery(query, stop_words);
vector<int> matched_documents;
int document_id = 0;
for (const auto& document : documents) {
if (MatchDocument(document, query_words)) {
matched_documents.push_back(document_id);
}
++document_id;
}
return matched_documents;
}
int main() {
const string stop_words_joined = ReadLine();
const set<string> stop_words = ParseStopWords(stop_words_joined);
// Read documents
vector<vector<string>> documents;
const int document_count = ReadLineWithNumber();
for (int document_id = 0; document_id < document_count; ++document_id) {
AddDocument(documents, stop_words, ReadLine());
}
const string query = ReadLine();
for (const int document_id : FindDocuments(documents, stop_words, query)) {
cout << "{ document_id = "s << document_id << " }"s << endl;
}
}

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