zh emberek

#include <iostream>
#include <vector>
#include <fstream>
#include <sstream>
#include <string>

class Ember {
public:
    int eletkor;
    int fizetes;
    Ember(int e, int f) {
        this->eletkor = e;
        this->fizetes = f;
    }
};

std::vector<Ember> emberek;
std::vector<Ember> beolvas(std::string filenev);
int feladat1(std::vector<Ember> v);
int feladat2(std::vector<Ember> v);
int feladat3(std::vector<Ember> v);
std::vector<int> feladat4(std::vector<Ember> v);
std::vector<int> f4;

int main() {
    emberek = beolvas("be1.txt");
    //std::cout << "Bolvasva..." << std::endl;
    std::cout << "" << feladat1(emberek) << std::endl;
    std::cout << "" << feladat2(emberek) << std::endl;
    std::cout << "" << feladat3(emberek) << std::endl;
    f4 = feladat4(emberek);
    std::cout << f4.size();
    for (int i = 0; i < f4.size(); ++i) {
        std::cout << " " << (f4.at(i)+1);
    }
    std::cout << std::endl;
    return 0;
}

std::vector<Ember> beolvas(std::string filenev) {
    std::ifstream s(filenev.c_str());
    std::string line;
    std::getline(std::cin, line, '\n');
    std::vector<Ember> res;
    while (std::getline(std::cin, line)) {
        std::istringstream iss(line);
        int e,f;
        iss >> e >> f;
        res.push_back(Ember(e,f));
    }
    return res;
}

int feladat1(std::vector<Ember> v) {
    int i = 1;
    int r = 0;
    Ember a = v.at(0);
    while (i < v.size()) {
        if (v.at(i).eletkor > v.at(r).eletkor) {
            r = i;
        }
        i++;
    }
    return r+1;
}

int feladat2(std::vector<Ember> v) {
    int sum = 0;
    for (int i = 0; i < v.size() ; i++) {
        if (v.at(i).eletkor > 40 && v.at(i).fizetes < 200000) {
            sum++;
        }
    }
    return sum;
}

int feladat3(std::vector<Ember> v) {
    bool e[150];
    for (int i = 0; i < 150; i++) {
        e[i] = false;
    }
    int sum = 0;
    for (int i = 0; i < v.size(); i++) {
        if (e[v.at(i).eletkor] == false) {
            e[v.at(i).eletkor] = true;
            sum++;
        }
    }
    return sum;
}

std::vector<int> feladat4(std::vector<Ember> v) {
    std::vector<int> res;
    for (int i = 0; i < v.size(); i++) {
        if (v.at(i).eletkor < 30) {
            res.push_back(i);
        }
    }
    return res;
}