#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

    int N, Q, l, r, ans=0;
    cin >> N >> Q;
    deque<bool> on(N+1);
    for (int i=0; i<Q; i++){
        cin >> l >> r;
        for (int j=l; j<=r; j++){
            if (on[j]) ans--;
            else ans++;
            on[j] ^= 1;
        }
        cout << ans << endl;
    }

    return 0;
}