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 PHP (7.4.4) (judge verdict: Wrong Answer)

<?php

$N = fgets(STDIN);


$MOD = pow(10,9)+7;

$a = 1;
$b = 1;
$c = 1;

for($i=0;$i<$N;$i++){
    $a = ($a * 10) % $MOD;
    $b = ($b * 9) % $MOD;
    $c = ($c * 8) % $MOD;
}

$ans = ($a-2*$b+$c)%$MOD;

while($ans<0){
    $ans+= $MOD;
}

echo $ans;

?>