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<iostream>
using namespace std;
int main()
{
    // 整数の入力
    int a,b,c,d,x,y,max;
    cin >> a >> b >> c >> d;
    //
    max = b * d;
  	if(max <= a * c){
      max = a * c;
    }
  	if(max <= a * d){
      max = a * d;
    }
  	if(max <= b * c){
      max = b * c;  
    }
    // 出力
    cout << max << endl;
    return 0;
}