fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: u32 = n.trim().parse().unwrap();

    let mut answer = 0;
    for x in 1..n {
        if f64::from(n * n - x * x).sqrt().fract() < f64::EPSILON {
            answer += 1;
        }
    }

    println!("{answer}");
}