Simple Calculator

A simple calculator accepts the following types of strings as input:

• $num+num$

• $num-num$

• $num\ast num$

• $num/num$

where $num$ is a positive integer between $1$ and $10000$ inclusive.

Find the value produced by the given expression. Here +, -, *, and / denote addition, subtraction, multiplication and division respectively. All operations are performed on integers, so "$5/3$" is $1$.

Input

One string that a simple calculator accepts.

Output

Print the result of the given expression.

Examples