#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <Windows.h>
#include <fstream>


template <typename container>
void print(const container& cont) {
    for (const auto& a : cont) {
        std::cout << a;
    }
    std::cout << std::endl;
}

struct student {
    std::string name;
    std::string surname;
    int course;
    int rating;
    double average_score;
};

std::ostream& operator<<(std::ostream& output, const student& student) {
    return output << student.name << " " << student.surname << " " << student.course << " " << student.rating << " " << student.average_score << std::endl;
}

std::istream& operator>>(std::istream& input, student& student) {
    return input >> student.name >> student.surname >> student.course >> student.rating >> student.average_score;
}

int main() {

    SetConsoleCP(1251);
    SetConsoleOutputCP(1251);

    std::vector<student> students;

    std::ifstream fin("students.txt");
    std::ofstream fout("students2.txt");

    if (!fin.is_open() || !fout.is_open()) {
        std::cout << "Ошибка открытия файла" << std::endl;
    }
    else {

        student temp;
        fin >> temp;
        while (!fin.eof()) {
            students.push_back(temp);
            fin >> temp;
        }

        print(students);

        std::sort(students.begin(), students.end(), [](const student & a, const student & b) {return a.surname < b.surname; });

        print(students);

        std::sort(students.begin(), students.end(), [](const student & a, const student & b) {return a.rating > b.rating; });

        print(students);

        std::sort(students.begin(), students.end(), [](const student & a, const student & b) {return a.average_score > b.average_score; });

        print(students);

        auto it = std::remove_if(students.begin(), students.end(), [](const student & a) {return a.course == 5; });

        students.erase(it, students.end());

        //students.erase(std::remove_if(students.begin(), students.end(), [](const student & a) {return a.course == 5; }), students.end());

        print(students);

        std::for_each(students.begin(), students.end(), [](student & a) {a.course++; });

        print(students);

        it = std::max_element(students.begin(), students.end(), [](const student & a, const student & b) {return a.rating < b.rating; });

        std::cout << *it << std::endl;

        for (const auto& a : students) {
            fout << a;
        }
        fin.close();
        fout.close();
        std::remove("students.txt");
        std::rename("students2.txt", "students.txt");
    }


}