#include<iostream>
#include<cstdio>
#include<cmath>
#include<cstdlib>
using namespace std;
int main(){
    double x;
    while (cin >> x){
        if (x <= -10){
            double result = abs(pow(x,5)) - 33;
            printf("%.1lf",result);
        }else if (x <= 10){
            double result = -0.5 * x + 10;
            printf("%.1lf",result);
        }else{
            double result = 2 * sqrt(x);
            printf("%.1lf",result);
        }
    }
}