What is wrong?????
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));
int a = Integer.parseInt(reader.readLine());
int b;
if ( a < 0)
{ a = a + a;
System.out.println( a); }
else if ( a > 0)
{ a = a + 1;
System.out.println( a ); }
else if ( a = 0)
{ System.out.println( a); }
}
}