#include <iostream>

// This is needed to manipulate the IO.
#include <iomanip>

using namespace std;

int main()
{

    // Sets the precision on numbers to be 2 decimal places.
    cout << setiosflags(ios::fixed | ios::showpoint) << setprecision(2);


    cout << 101.9899 << endl;
    cout << 101.0578 << endl;

    cout << "Hello world!" << std::endl;
    return 0;

}