#include <bits/stdc++.h>
using namespace std;
int main() {
double a = -.0049 ;
cout << fixed << setprecision(2) << a << '\n';
int b = rint(a*100);
cout << b / 100 << '.' << setfill('0') << setw(2) << b %100 << '\n';
// lub
a = b / 100.0;
cout << fixed << setprecision(2) << a << '\n';
}
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