fn main() {
    let mut nq = String::new();
    std::io::stdin().read_line(&mut nq).ok();
    let nq: Vec<usize> = nq.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nq[0];
    let q = nq[1];
    let pairs = (0..q).map(|_| {
            let mut temp = String::new();
            std::io::stdin().read_line(&mut temp).ok();
            let temp: Vec<usize> = temp.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
            (temp[0]-1, temp[1])
        })
        .collect::<Vec<_>>();

    let mut lights = vec![false; n];
    let mut cnt = 0usize;
    for &(l, r) in pairs.iter() {
        for i in l..r {
            if lights[i] {
                cnt -= 1;
            } else {
                cnt += 1;
            }
            lights[i] = !lights[i];
        }
        println!("{}", cnt);
    }
}