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 C# (.NET Core 3.1.201) (judge verdict: Wrong Answer)

using System;
using System.Numerics;
   class Program
    {
        static void Main()
        {
            var MOD = (BigInteger)1e9 + 7;
            var N = int.Parse(Console.ReadLine());

            var ans = BigInteger.ModPow(10, N, MOD);
            ans -= BigInteger.ModPow(9, N, MOD)*2;
            ans += BigInteger.ModPow(8, N, MOD);

            Console.WriteLine(ans%MOD);
        }
    }