Problems

# Degree of two

# Degree of two

**n** degrees of number **2** are written sequentially in a line, i.e. the numbers from **2** to `2`

without spaces. Find the value of ^{n}**n**.

#### Input

**n** (**1** ≤ **n** ≤ **1000**) degrees of number **2** are written sequentially in a line.

#### Output

Print the value of **n**.

Input example #1

248163264128

Output example #1

7