Simple Arithmetic Operations

Given an arithmetic expression consisting of two positive integers and an operator, compute the result. The allowed operators are:

• +: Addition
• -: Subtraction
• *: Multiplication
• /: Integer Division, i.e. $$a\,/\,b = \lfloor \frac{a}{b} \rfloor$$
• %: Modulus (remainder)

The format of the arithmetic expression is:

operand operator operand (spaces around the operator are allowed)

Output the computed result.

inputFormat

The input consists of a single line containing an expression in the format: number operator number. The operator will be one of +, -, *, /, or %. There may be extra spaces around the operator.

outputFormat

Output a single integer which is the result of the arithmetic operation.

sample

3 + 5

8