#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
#include <atcoder/modint>
#include <atcoder/lazysegtree>
using namespace std;
using namespace atcoder;

using mint = modint998244353;
using val = pair<mint, int>;
using func = pair<mint, mint>;

val op(val a, val b) {
	mint a1, b1;
	int a2, b2;
	tie(a1, a2) = a;
	tie(b1, b2) = b;
	return make_pair(a1 + b1, a2 + b2);
}

val e() {
	return make_pair(mint(0), 0);
}

val mapping(func f, val x) {
	mint x1, b, c;
	int x2;
	tie(x1, x2) = x;
	tie(b, c) = f;
	return make_pair(x1 * b + c * x2, x2);
}

func composition(func f, func g) {
	mint b1, c1, b2, c2;
	tie(b1, c1) = f;
	tie(b2, c2) = g;
	return make_pair(b1 * b2, b1 * c2 + c1);
}

func id() {
	return make_pair(mint(1), mint(0));
}

int main() {
	int n, q;
	cin >> n >> q;

	vector<val> a(n);
	for (int i = 0; i < n; i++) {
		a.at(i) = make_pair(mint(0), 1);
	}
	lazy_segtree<val, op, e, func, mapping, composition, id> seg(a);

	for (int i = 0; i < q; i++) {
		int l, r;
		cin >> l >> r;
		l--;
		seg.apply(l, r, make_pair(-1, 1));
		cout << seg.prod(0, n).first.val() << endl;
	}
}