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: Runtime Error)

#include<stdio.h>
#define N 256
const char str[N];
int num=0;

void main(){
  fgets(str, N, stdin);
  num = atoi(str);
  if(num==0) printf("1\n");
  else if(num==1) printf("0\n"); 
  else{
    printf("else\n"); //do nothing
  }
}