use proconio::input;

fn main() {
    input! {
        l: usize,
        r: usize,
    }

    let a = if l <= 295 {
        0
    } else if l <= 416 {
        1
    } else {
        2
    };

    let b = if r <= 295 {
        0
    } else if r <= 416 {
        1
    } else {
        2
    };

    println!("{}", b - a);
}