//package javaapplication1;

import java.util.*;
import java.*;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.File;
import java.lang.String;
import java.util.regex.*;

public class Main {

   public static void main(String[] args) throws Exception{
        Scanner in = new Scanner(System.in);
     //  Scanner in = new Scanner(new FileReader("input.txt"));
       // PrintWriter out = new PrintWriter(new FileWriter("output.txt"));
        String s = in.nextLine();

       Pattern p = Pattern.compile("[0]{0,170}([0-9]{1,2}|1[0-9]{2}|25[0-5]{1}|2[0-4]{1}[0-9]{1})[\\.]{1}[0]{0,170}([0-9]{1,2}|1[0-9]{2}|25[0-5]{1}|2[0-4]{1}[0-9]{1})[\\.]{1}[0]{0,170}([0-9]{1,2}|1[0-9]{2}|25[0-5]{1}|2[0-4]{1}[0-9]{1})[\\.]{1}[0]{0,170}([0-9]{1,2}|1[0-9]{2}|25[0-5]{1}|2[0-4]{1}[0-9]{1})");

       if(!p.matcher(s).matches() )
           System.out.println(0);
       else
           System.out.println(1);

   }

}