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 Ruby (2.7.1) (judge verdict: Runtime Error)

a,b,c,d = gets.split(" ").map(&:to_i)
ac = a*c
ad = a*d
bc = b*c
bd = b*d
if ac >= ad
    if ac >= bc
        if ac >= bd
            puts ac
        end
    end
elsif ad >= ac
    if ad >= bc
        if ad >= bd
            puts ad
        end
    end
elsif bc >= ac
    if bc >= ad
        if bc >= bd
            puts bc
        end
    end
elsif bd >= ac
    if bd >= ad
        if bd >= bc
            puts bd
        end
    end
end