#include <fstream>
#include <iostream>
#include <vector>
#include <stdlib.h>
#include <string>
#include <cstring>
#include <sstream>

using namespace std;
vector<string> names;
vector<string> last_name;
vector<string> absences;
vector<string> unatoned;
vector<int> abscences_convert;
vector<int> unatoned_convert;
void write(int n,string data)
{    ofstream outfile;
    outfile.open("afile.dat");
    for(int i=0; i<n; i++){
    cout << "Enter your name:";
    getline(cin, data);
    outfile << data<<" ";
    cout<<"Enter last name: ";
    getline(cin,data);
    outfile<<data<<" ";
    cout << "Enter atoned absenses: ";
    getline(cin,data);
    outfile<<data<<" ";
    cout << "Enter unatoned absenses: ";
    getline(cin,data);
    outfile<<data<<endl;}
    outfile.close();
}
void apply(string b)
{
    ifstream read;
    read.open("afile.dat");
    int i=0;
    while(!read.eof())
    {
        if(i==4)
        {
            i=0;
        }
        read>>b;
        if(i==0)
        {
            names.push_back(b);
        }
        if(i==1)
        {
            last_name.push_back(b);
        }
        if(i==2)
        {
            absences.push_back(b);
        }
        if(i==3)
        {
            unatoned.push_back(b);
        }
        i++;
    }
}
void convert(int n)
{
    int x;
    for(int i=0; i<n; i++)
    {
        stringstream geek(absences[i]);
        stringstream convert(unatoned[i]);
        geek>>x;
        abscences_convert.push_back(x);
        convert>>x;
        unatoned_convert.push_back(x);
    }
}

void smetai(int n)

{
    int otsustviq=0;
    int neizvineni=0;
    for(int i=0; i<n; i++)
    {
        otsustviq=otsustviq+abscences_convert[i];
        neizvineni=neizvineni+unatoned_convert[i];

    }
    cout<<otsustviq<<" "<<neizvineni<<endl;
}
void max_otsustviq(int n)
{
    int max=0;
    string name;
    for(int i=1; i<n; i++)
    {
        if(abscences_convert[max]<abscences_convert[i])
        {
            max=i;
        }
    }
    name=names[max];
    cout<<name<<endl;
}
void sort(int n)
{
    for(int i=1; i<5; i++)
    {
        for(int j=1; j<5; j++)
        {
            if(names[j-1]>names[j])
            {
                swap(names[j-1], names[j]);
                swap(last_name[j-1], last_name[j]);
                swap(absences[j-1], absences[j]);
                swap(unatoned[j-1], unatoned[j]);
            }
        }
    }
ofstream outfile;
    outfile.open("afile.dat");
for(int i=0; i<n; i++){outfile<<names[i]<<" "<<last_name[i]<<" "<<absences[i]<<" "<<unatoned[i]<<endl;}}


void info(int n)
{
    string ime;
    getline(cin,ime);
    for(int i=0; i<n; i++)
    {
        if(ime==names[i])
        {
            cout<<names[i]<<" "<<last_name[i]<<" "<<absences[i]<<" "<<unatoned[i]<<endl;
            break;
        }
    }
}


void remove(int n)
{
    string ime1;
    getline(cin,ime1);
    for(int i=0; i<n; i++)
    {
        if(ime1==names[i])
        {
            names[i].erase();
            last_name[i].erase();
            absences[i].erase();
            unatoned[i].erase();
            break;

        }

    }
    ofstream outfile;
    outfile.open("afile.dat");
for(int i=0; i<n; i++){outfile<<names[i]<<" "<<last_name[i]<<" "<<absences[i]<<" "<<unatoned[i]<<endl;}
}
int main ()
{
    string data;
    int k;
    int n;
    cin>>n;
    cin.ignore();
    while(k){
    cout<<"1. zapishete v fail"<<endl;
    cout<<"2. izvdei info za uchenik"<<endl;
    cout<<"3. sort"<<endl;
    cout<<"4. delete"<<endl;
    cout<<"5. izvedi uchenik sus nai-mnogo otsustviq"<<endl;
    cout<<"6. izvineni i neizvineni otsustviq"<<endl;
    cout<<"7. exit"<<endl;
    cin>>k;
    cin.ignore();
    if(k==1){write(n,data); string b; apply(b); convert(n);}
    if(k==2){info(n);}
    if(k==3){sort(n);}
    if(k==4){remove(n);n=n-1;}
    if(k==5){cout<<"uchenikat s nai mnogo neizvineni: "; max_otsustviq(n);}
    if(k==6){cout<<"broi izvineni i neizvineni otsusviq: ";smetai(n);}
    if(k==7){return 0;}

    }
    return 0;
}