1 #include<iostream>
 2 #include<cmath>
 3 #include <iomanip>
 4 using namespace std;
 5 
 6 int main()
 7 {
 8     double N;
 9     while (cin >> N)
10     {
11         cout << setiosflags(ios::fixed) << setprecision(2)<<fabs(N) << endl;
12     }
13     return 0;
14 }