DenizQuldurlari

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int a = scan.nextInt();
        int m = scan.nextInt();
        int count = 0;

        for (int i = a; i <=m; i++){
            m-=i;
            count++;
        }

        System.out.println(count);
    }

}