#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
typedef long long ll;
using namespace std;

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

    int cur = 0;
    vector<int> d(N + 1);
    while (Q--) {
        int l, r;
        cin >> l >> r;
        l--;
        for (int i = l; i < r; ++i) {
            d[i]++;
            if (d[i] % 2 == 1)
                cur++;
            else
                cur--;
        }

        cout << cur << "\n";
    }

    return 0;
}