medh

#include <iostream>
using namespace std;


int main () {
  float x,s=0.0;
   int n,i=1;
   cout<<"n= ";
   cin>>n;
   while (i<=n)
   {
       cout<<"nr"<<i<<'=';
       cin>>x;
       s=s+1/x;
       i++;
   }
   cout<<"media armonica e: "<<n/s;
  return 0;
}