Exponential Operation

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

The first line contains an integer $N$.

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.

• $1 \le N \le 250$