For a real number \(x\), evaluate \((e^x+1)/(x-3)\) when it is defined.

Input

One real number \(x\).

Output

Start the output with Nhap x =. If \(x=3\), append Bieu thuc khong xac dinh. Otherwise append Y= followed by the value, formatted with at most six significant digits and no unnecessary trailing zeros; scientific notation may be used for large magnitudes.

Example

Input

1

Output

Nhap x = Y= -1.85914