fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let mut n: usize = n.trim().parse().unwrap();
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let itr = s.trim().split_whitespace();
    let a: Vec<u8> = itr.map(|x| x.parse().unwrap()).collect();
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let itr = s.trim().split_whitespace();
    let b: Vec<u8> = itr.map(|x| x.parse().unwrap()).collect();

    let mut ans = 0;
    if a[0] ^ b[0] == 1 { ans += 1; }
    for i in 1..n{
        if a[i] != b[i] && a[i - 1] == b[i - 1] { ans += 1; }
    }

    println!("{}", ans);
}