use proconio::{fastout, input};

#[fastout]
fn main() {
    input! {
        l: u32,
        r: u32,
    }

    println!("{}", solve(l, r));
}

const fn prepare() -> [u32; 421] {
	let mut count = [0; 421];
	let mut i = 0;
	while i < 421 {
		if i <= 295 {
			count[i] = 0;
		} else if i <= 416 {
			count[i] = 1;
		} else {
			count[i] = 2;
		}
		i += 1;
	}
	count
}

fn solve(l: u32, r: u32) -> u32 {
    const COUNT: [u32; 421] = prepare();
	COUNT[r as usize] - COUNT[l as usize]
}