//precision de flots
#include <iostream>
#include <iomanip>

using namespace std;

int main() {
  //remplacez float par double  
  float x = 1000. / 3.0;
  cout << "x = 1000./3. = " << setprecision(12) << x << endl;
  float y = x - 333.;
  cout << "y = x - 333. = " << setprecision(12) << y << endl;
  float z = 3 * y - 1.;
  cout << "z = 3*y -1.  = " << setprecision(12) << z << endl;

  return 0;
}