#include<iostream.h>#include<conio.h>#include<math.h>#include<iomanip.h>
void main(){
unsigned n,i,p;float s;
cout<<"n=";cin>>n;s=0;p=1;for(i=1;i<=n;i++){p*=i+1;s+=1*1./p; }
cout<<"suma este egala cu "<<s<<endl; }