#include <iostream>#include <iomanip>#include <cmath>using namespace std;
int main(){    int n,x,y,i;    float p=1, mg=1;    do    {        cin>>n;    }    while ((n<=1)&&(n>10));    for (i=1; i<=n; i++)    {           cin>>x;           p=p*x;
    }    mg=pow(p,1.0/n);    cout <<fixed<<setprecision(2)<<mg;
return 0;
}