import java.io.*;
import java.util.Scanner;
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
Scanner scanner = new Scanner(System.in);
int num = scanner.nextLine();
if (n > 0) {
n = 2 * n;
System.out.println(n);
}
else if ( n == 0 )
System.out.println(0);
else {
n = n + 1;
System.out.println(0);
}
}
}
package com.codegym.task.task04.task0412;
/*
Positive and negative numbers
*/
import java.io.*;
import java.util.Scanner;
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
Scanner scanner = new Scanner(System.in);
int num = scanner.nextLine();
if (n > 0) {
n = 2 * n;
System.out.println(n);
}
else if ( n == 0 )
System.out.println(0);
else {
n = n + 1;
System.out.println(0);
}
}
}