what's wrong here? the output seems to be correct.
package com.codegym.task.task04.task0412;
/*
Positive and negative numbers
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
String b=reader.readLine();
int a=Integer.parseInt(b);
if(a>0)
{ a=a*2;
System.out.println(a); }
else if(a<0)
{a=a+1;
System.out.println(a);}
if(a==0)
System.out.println("zero");
}
}