Given a real number \(x\), find \(\lfloor x\rfloor\).

Input

One real number \(x\).

Output

If \(x<=-1\), print only \(\lfloor x\rfloor\). Otherwise print x=So nguyen lon nhat khong lon hon x la: floor, replacing x by the input formatted with at most six significant digits and floor by \(\lfloor x\rfloor\).

Example

Input

-2.9

Output

-3