Вводный курс: основы C++ | Урок 4: Словари и константность

#include <string>
#include <vector>
#include <iostream>
#include <algorithm>
#include <map>

using namespace std;

string FindWidespreadBird(const vector<string>& types) {
    map<string, int>birds;
    for (const auto& type : types) {
        ++birds[type];
    }
    auto pr = max_element(birds.begin(), birds.end(), [](const auto&x, const auto& y) {           //алгоритмом max_element и лямбдой
                                                                                                  //нахожу ключ, значение которого
                                                                                                  //больше всех
        return x.second < y.second;
        });

    string bird = pr->first;
    return bird;
}

int main() {
    vector<string> bird_types1 = { "zyablik"s, "sinica"s, "vorobey"s, "zyablik"s, "sinica"s, "sinica"s };
    if (FindWidespreadBird(bird_types1) == "sinica"s) {
        cout << "Correct"s << endl;
    }
    else {
        cout << "Not correct"s << endl;
    }

    vector<string> bird_types2 = { "ruh"s, "sirin"s, "blue bird of fortune"s, "finist"s, "fenix"s };
    if (FindWidespreadBird(bird_types2) == "blue bird of fortune"s) {
        cout << "Correct"s << endl;
    }
    else {
        cout << "Not correct"s << endl;
    }
}