#include <iostream>
#include <iomanip>
#include <string.h>
using namespace std;
int main()
{
    int n,p;
    cin>>n>>p;
    struct elev
    {
        float n1,n2,n3;
        float medie;
        char nume[105],prenume[105];
    }x[105];
    for (int i=1;i<=n;i++)
    {
        cin>>x[i].nume>>x[i].prenume>>x[i].n1>>x[i].n2>>x[i].n3;
        x[i].medie=(x[i].n1+x[i].n2+x[i].n3)/3;
    }
    float mg=0;
    for (int i=1;i<=n;i++)
        mg+=x[i].medie;
    mg=mg/n;
    int c=0;
    if (p==1)
    {
        for (int i=1;i<=n;i++)
            if (x[i].medie>mg)
                c++;
        cout<<c;
        return 0;
    }
    if (p==2)
    {
        cout<<setprecision(3)<<mg<<endl;
        for (int i=1;i<n;i++)
            for (int j=i+1;j<=n;j++)
                {if (x[i].medie<x[j].medie)
                    {
                        elev aux=x[i];
                        x[i]=x[j];
                        x[j]=aux;
                    }
                if (x[i].medie==x[j].medie)
                    {if (strcmp(x[i].nume,x[j].nume)>0)
                    {
                        elev aux=x[i];
                        x[i]=x[j];
                        x[j]=aux;
                    }
                    if (strcmp(x[i].nume,x[j].nume)==0)
                    {
                        if (strcmp(x[i].prenume,x[j].prenume)>0)
                        {
                            elev aux=x[i];
                            x[i]=x[j];
                            x[j]=aux;
                        }
                    }
                    }

                }

        for (int i=1;i<=n;i++)
        {	int c=0;
            int n1=x[i].medie;
         while (n1)
         {
             c++;
             n1/=10;
         }
            cout<<x[i].nume<<" "<<x[i].prenume<<" "<<setprecision(c+2)<<x[i].medie<<endl;
        }
    }
}