#include<vector>
#include<cstdio>
#include<cmath>
#include<iostream>

using namespace std;

int main(){
    
    vector<double> values;
    double temp;
    
    while(scanf("%lf",&temp) != EOF){
         values.push_back(temp);
    }
    
    for(int i = 0;i < values.size();i++){
            printf("%.04lf\n",sqrt(values.pop_back());
    }
    
    return 0;
    
}