#include <iostream>
#include <vector>
using namespace std;
int main()
{
	int N, Q,i,j;
	cin >> N >> Q;
	vector<int> F(N, 0);
	int L, R;
	int Sum = 0;
	for (i = 0; i < Q; i++) {
		cin >> L >> R;
		for (j = L; j <= R; j++) {
			if (F[j - 1] == 0) {
				F[j - 1] = 1;
				Sum++;
			}else {
				F[j - 1] = 0;
				Sum--;
			}
		}
		cout << Sum << endl;
	}
	return 0;
}