Can you write a simple calculator?
The input contains 1 integer, an operation
+-*/, and another integer. The output should contain the result of the expression. If the operation is not one of the
+-*/, the program should print
Unsupported operation. If the program encounters division by 0, it should print
Cannot divide by 0.
2 * 2
2 / 0
Cannot divide by 0
Time limit: 1 seconds
Memory limit: 512 MB
Output limit: 1 MB