Calculator

This program accepts an arithmetic expression in prefix notation on standard input and prints the result on standard output.

Supported operations:

All calculations are preformed on Integers in range [-2^{23}, 2^{23} - 1]. Negative numbers can be written as (- 0 n), where n is the number

Here are some examples:

(* 21 2)
00000042
(/ 6 (* 2 (+ 2 1)))
00000001
(* (/ 6 2) (+ 2 1))
00000009
(- 33 (* 4 25))
-00000067