#include<iostream>

int main () {
  int n,deb;
  float reslt;
  std::cout << " Entrez un enter n et i, ce programme calcule la somme des inverses de 1/i a 1/n" <<std::endl;
  std::cin >> n >> deb; 
  for (int i=deb; i <= n; i ++) {
	reslt += 1.0/i;
  }
  std::cout<<"Le resultat est : "<< reslt <<std::endl;
  return 0;
  }