Description

A simple calculator that supports four basic operations: addition (+), subtraction (-), multiplication (*), and division (/). Only integer input and output are considered, and the data and results will not exceed the range of the int type.
However:

1. If division by zero occurs, output: Divided by zero!
2. If an invalid operator (anything other than +, -, *, /) is encountered, output: Invalid operator!

Input Format

The input consists of a single line with three parameters: the first and second parameters are integers, and the third parameter is the operator (+, -, *, /).

Output Format

The output is a single line containing the result of the operation as an integer.

(Note: The corrected typo in the original text "Divided by zero!" has been adjusted to "Divided by zero!" for consistency.)

1 2 +

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