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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n, q;
    cin >> n >> q;

    vector<int> a(n, 0);
    int s = 0;

    while (q--) {
        int l, r;
        cin >> l >> r;
        l--;

        for (int i = l; i < r; i++) {
            s -= a[i];
            a[i] ^= 1;
            s += a[i];
        }
        cout << s << '\n';
    }

    return 0;
}