Editorial-CFRS03

editorial
1

Problem Link:Parallel Resister
Question setter: @sanjeev2001
Difficulty:: Easy
Code::

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        int n;
        cin>>n;
        int a[n];
        int pr=1;
        for(int i=0;i<n;i++)
        {
            cin>>a[i];
            pr*=a[i];
        }
        double sum=0;
        for(int i=0;i<n;i++)
        {
            sum+=double(pr/a[i]);
        }
        cout<<fixed<<setprecision(4)<<double(pr/sum)<<endl;
    }
}