#include<iostream>
#include<iomanip>
#include<cmath>
using namespace std;
int main() {
long long n,i=0,c=0;
double a[100001];
 while(cin>>n){
  a[i]=sqrt(n);
   i++;
   c++;
}
for(int i=c-1; i>=0; i--)
 cout<<fixed<<setprecision(4)<<a[i]<<endl;
 system("pause");
  return 0;
}

The size of the input stream does not exceed 256K