please tell me my false

package com.codegym.task.task04.task0425; /* Target locked! */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { //write your code here BufferedReader bf=new BufferedReader(new InputStreamReader(System.in)) ; String y=bf.readLine(); String x=bf.readLine(); int a=Integer.parseInt(x) ; int b=Integer.parseInt(y) ; if(a>0&&b>0) System.out.println("1"); else if(a<0&&b>0) System.out.println("2"); else if(a<0&&b<0)System.out.println("3"); else if (a>0&&b<0) System.out.println("4") ; } }