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


template <typename Container>
void Print(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;
}

int main() {
    setlocale(LC_ALL, "ru");
    std::vector<Student> students{{"Иван", "Иванов", 1, 33, 3.7 }, { "Владимир", "Владимиров", 3, 39, 3.9 }, { "Геннадий", "Петров", 2, 56, 4.2 }, { "Ольга", "Григорьева", 5, 48, 4.0 }, { "Константин", "Сидоров", 4, 29, 3.5 }, { "Елена", "Гришина", 1, 75, 4.9 }};

    Print(students);

    std::sort(students.begin(), students.end(), [](const Student& left, const Student& right) { return left.surname < right.surname; });

    Print(students);
}