#include <iostream>
#include <cmath>
#include <cstring>
#include <fstream>
#include <iomanip>
using namespace std;
ifstream f("date.in");
struct nod
{
    char nume[99];
    float med;
    nod *pred, *urm;
}*c, *p, *u;
int med=0;

void creare()
{
    char x[99];
    float y;
    c = new nod;
    c -> pred = NULL;
    c -> urm = NULL;
    f>>x;
    strcpy(c->nume,x);
    f>>y;
    c->med=y;
    p = c;
    u = c;


    while(f>>x>>y)
    {
        c = new nod;
        strcpy(c->nume,x);
        c->med=y;

        u -> urm = c;
        c -> pred = u;
        c -> urm = NULL;
        u = c;
    }

}
void afisare()
{

    c = p;
    while(c)
    {
        cout << endl;
        cout << c -> nume << "-"<<c->med;
        c = c -> urm;
    }
}

void medmax()
{
    cout<<endl;
    c=p;
    nod *maxi;
    maxi=p;
    while(c)
    {
        if(c->med>maxi->med)
            maxi=c;
        c=c->urm;
    }
    cout<<"Media cea mai mare :"<<maxi->nume<<"-"<<maxi->med;
}
void intreoptsizece()
{
    cout<<endl<<"Mediile intre 8 si 10:";
    c=p;
    while(c)
    {
        if(c->med>8&&c->med<=10)
            cout<<c->nume<<" ";
        c=c->urm;
    }
}
void cautare()
{
    c=p;
    char x[99];
    cout<<endl<<"Cautati:";
    cin>>x;
cout<<"Media lui "
 <<x<< " este ";
    while(c)
    {
        if(strcmp(x,c->nume)==0)
            cout<<c->med<<" ";
        c=c->urm;
    }
}
void mediepeclasa()
{
    float med=0,k=0;
    c=p;
    while(c)
    {
        med=med+c->med;
        k++;
    c=c->urm;
    }
    cout<<endl<<"Media pe clasa:";
    cout<<med/k;
}
int main()
{
    creare();
    afisare();
    medmax();
    intreoptsizece();
    cautare();
    mediepeclasa();
    return 0;
}