#include <bits/stdc++.h>
using namespace std;

void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fast_io();
    int n, q;
    cin >> n >> q;
    vector<bool> state(n);
    int ans = 0;
    for (; q--;) {
        int l, r;
        cin >> l >> r;
        l--;
        for (int i = l; i < r; i++) {
            if (state[i]) {
                ans--;
            } else {
                ans++;
            }
            state[i] = !state[i];
        }
        cout << ans << "\n";
    }
}