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 (GCC 9.2.1) (judge verdict: Wrong Answer)

#include <stdio.h>
#include <stdlib.h>
int main(void){
  long long int a,b,c,d;
  unsigned long long int l;
  if(scanf("%lld %lld %lld %lld",&a,&b,&c,&d) == EOF) return 1;
  l=a*c;
  if(a*d > l) l=a*d;
  if(b*c > l) l=b*c;
  if(b*d > l) l=b*d;
  printf("%llu\n",l);
  return 0;
}