Exponential Operation

Time limit

Memory limit

8 MB

Problem

Given a positive integer $N$ , write a program that prints the exact decimal value of $\displaystyle\frac{1}{2^N}$ .

Input

The first line contains an integer $N$ .

Output

Print the exact value of $\displaystyle\frac{1}{2^N}$ in decimal notation on the first line. Do not append unnecessary trailing $0$ s after the decimal representation.

Constraints

$1 \le N \le 250$