#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using ll = long long;
using namespace std;

int main()
{
    int n, q, cnt = 0;
    cin >> n >> q;
    vector<int> a(n+1);
    for(int i = 0; i < q; i++){
        int l , r;
        cin >> l >> r;
        for (int j = l; j <= r; j++){
            if (a[j]){
                a[j] = 0;
                cnt--;
            } else {
                a[j]++;
                cnt++;
            }
        }
        cout << cnt << endl;
    }
}