Problem:
Score : 100 points

Problem Statement

Given is an integer x that is greater than or equal to 0, and less than or equal to 1.
Output 1 if x is equal to 0, or 0 if x is equal to 1.

Constraints

0 \leq x \leq 1

x is an integer

Input

Input is given from Standard Input in the following format:

x

Output

Print 1 if x is equal to 0, or 0 if x is equal to 1.

Sample Input 1

1

Sample Output 1

0

Sample Input 2

0

Sample Output 2

1

Solution in OCaml (4.10.0) (judge verdict: Wrong Answer)

let () =
  Scanf.scanf "%d\n" @@ fun n ->
  let rec powmod x y ans = if y = 0 then ans else powmod x (y-1) ((ans * x) mod 1000000007) in
  Printf.printf "%d\n"
    (((powmod 10 n 1) - (powmod 9 n 1) - (powmod 9 n 1) + (powmod 8 n 1) + 1000000007) mod 1000000007)