#include"lib/std_lib_facilities.h"

int main(){
  vector<double> S {};

  int towns = 0;
  cout << "Skolko gorodow?";
  cin >> towns;

  for(int i = 0;i<towns;i++){
    cout << "Vvedite rosstoynie(km)";
    double x = 0.0;
    cin >> x;
    S.push_back(x);
  }

   double sum = 0;

  for(int i = 0;i<towns;i++){
    sum = sum + S[i];
  }

  int what = 0;
  cout << "Kakoy gorod(nomer)";
  cin >> what;

  what--;

  vector<double> x = {};
  double sum5 = 0;
  double z = 0;
  double y = 0;

 for(double i = -2;i<2;i++){
   z = what - i;
   y = S[z];
   x.push_back(y);
   sum5 = S[z];
}

    sort(x);

  double naibolshoe = x[0];
    double naimenshoe = x[4];

  double srednie = 0;

  srednie = sum5 / 5;

  //output

  cout << sum << '\n';
  cout << naibolshoe << '\n';
  cout << naimenshoe << '\n';
  cout << srednie << '\n';
}