solution.java

// https://github.com/Utkarsh299-tech

import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Scanner;

class Solution{

 public static void main(String[] args){
 Scanner in = new Scanner(System.in);
 while(in.hasNext()){
 String IP = in.next();
 System.out.println(IP.matches(new MyRegex().pattern));
 }

 }
}

/*
 [01]?\\d{1,2} matches numbers 0-199.
 2[0-4]\\d matches numbers 200-249
 25[0-5] matches numbers 250-255
*/

class MyRegex {
 String num = "([01]?\\d{1,2}|2[0-4]\\d|25[0-5])";
 String pattern = num + "." + num + "." + num + "." + num;
}