fn read() -> (usize, Vec<(usize, usize)>) {
    use std::io::Read;
    let mut s = String::new();
    std::io::stdin().read_to_string(&mut s).unwrap();
    let mut it = s.trim().split_whitespace();
    let mut next = |l: usize, r: usize| -> usize {
        let v = it.next().unwrap().parse::<usize>().unwrap();
        assert!(l <= v && v <= r);
        v
    };
    let n = next(1, 10usize.pow(5) * 5);
    let q = next(1, 10usize.pow(5));
    let mut op = vec![(0, 0); q];
    for op in op.iter_mut() {
        let l = next(1, n);
        let r = next(l, n);
        *op = (l - 1, r);
    }
    (n, op)
}

fn main() {
    let (n, op) = read();
    use std::io::Write;
    let out = std::io::stdout();
    let mut out = std::io::BufWriter::new(out.lock());
    let mut cnt = 0;
    let mut state = vec![0; n];
    for (l, r) in op {
        for s in state[l..r].iter_mut() {
            cnt -= *s;
            *s ^= 1;
            cnt += *s;
        }
        writeln!(out, "{}", cnt).ok();
    }
}