#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)

using std::cin;
using std::cout;
using std::vector;

int main() {
	int n, q;
	cin >> n >> q;
	
	vector<int> a(n);
	int sum = 0;
	while (q--) {
		int l, r;
		cin >> l >> r;
		--l;
		for (int i = l; i < r; ++i) {
			sum -= a[i];
			a[i] ^= 1;
			sum += a[i];
		}
		cout << sum << '\n';
	}
	
	return 0;
}