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 (Clang 10.0.0) (judge verdict: Wrong Answer)

#include <stdio.h>
#include <math.h>

int expn(int, int);



int main(void)
{
    int n,a;
    scanf("%d",&n);
    printf("%d",expn(10,n)-(expn(9,n)*2)+expn(8,n));    
}

int expn(int x,int y){
    int res=1;
    for(int i=1;i<=y;i++){
        res = res *x;
    }
    return res;
}