#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int INF = 1000000100;
const ll INFL = 2e18;
template <class T>bool chmin(T &a, T b){ if (a > b) { a = b; return true;} else return false;}
template <class T>bool chmax(T &a, T b){ if (a < b) { a = b; return true;} else return false;}

int main() {
    int N;
    cin >> N;
    int Q;
    cin >> Q;

    vector<int> Lamp(N,0);
    int now = 0;
    for (int i = 0;i < Q;i++) {
        int L,R;
        cin >> L >> R;
        L--,R--;
        for (int j = L;j <= R;j++) {
            if (Lamp[j]) {
                now--;
                Lamp[j] = 0;
            }
            else {
                now++;
                Lamp[j] = 1;
            }
        }

        cout << now << endl;
    }
}