#![allow(unused_imports)]
use std::{*, collections::*, ops::*, cmp::*, iter::*};
use proconio::{input, fastout};

fn main() {
    solve();
}

type us = usize;

// CONTEST(abcXXX-a)
#[fastout]
fn solve() {
    input! {l:us, r:us}
    let l = if l <= 295 { 0 } else if l <= 416 { 1 } else { 2 };
    let r = if r <= 295 { 0 } else if r <= 416 { 1 } else { 2 };
    println!("{}", r-l);
}

// #CAP(fumin::modint)
pub mod fumin {
}