#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");
	}

	
}