import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.Scanner;

class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner i = new Scanner(System.in);
		int n = i.nextInt();
		int r = i.nextInt();
		double result = Math.ceil(r / (n * 1.44));
		System.out.println(String.format("%.0f", result));
	}
}