#include <iostream>
#include <iomanip>
#include <cmath>
 
using namespace std;
 
 
double arcSinTaylor(double x) {
    double result = x, oldResult = -1000;
    double q = x;
    x = x*x;
    int i=1;
    while (result!=oldResult) {
       oldResult = result;
       q *=x*i/(i+1);
       i +=2; 
       result += q/i;
    }
    return result;
}
 
int main() {
    double x, precision;
    while (cin >> x) {
          double a = arcSinTaylor(x);
	      double b = asin(x);
	      cout <<  setw(6) << x  
               <<  setw(10) << setprecision(6)  <<  a  
               <<  setw(10) <<  b 
               <<  setw(10) << setprecision(2) << b-a << endl;
    }
	return 0;
}

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MAowLjI1CjAuNQowLjc1Ci0wLjI1Ci0wLjUKLTAuNzUK

0
0.25
0.5
0.75
-0.25
-0.5
-0.75