#include<iostream>
#include<fstream>
#include<stdlib.h>
#include<stdio.h>
#include<iomanip>
#include<math.h>
#include<string>

using namespace std;

int main(int argv, char *argc[]){

  if(argv < 3){
    cerr << "NEED INPUT POSITION and INPUT file\n";
    exit(1);
  }

  int index_i = atoi(argc[1]);
  string str;

  ifstream inp; inp.open(argc[2]);
  ofstream out; out.open("POSCAR");
 
 
  for(int i = 0 ; i < 33; i++){
    getline(inp,str);
    out<<str << "\n";
  }  
  inp.close();
  
  double Lx     = 6.9551492539117996 ;
  double Ly     = 5.6788555856610001 ;
  double Lz     = 25.0163942029436015;
  double zshift = 0.3505447237209580 ; 
  //ELHAM, YOU NEED TO CHANGE nx AND ny coordinates
  int nx = 0;  //nx = 0,1,...,8
  int ny = 0;  //ny = 0,1,2  ny = 0 means top line ; ny = 1 -> t2b line and n=2 is brg line
  //NOTHING TO DO HERE
  double x = 1./9. * nx;
  double y = 1./8. * ny;
//  double z = index_i*0.1 - 3.65 + zshift*Lz;
  double z = index_i*0.0025 + zshift*Lz + 0.0025;
  double zc = z/Lz; 

  out << "  " << setprecision(16) << fixed << setw(18) << x <<  "  " << setw(18) << y << " " << setw(18) << zc << "   F   F   F \n";



  


}