//#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
#include <iostream>
#include <algorithm>
using namespace std;
using ll = long long;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using vi = vector<int>;  using vvi = vector<vi>;
using vl = vector<ll>;   using vvl = vector<vl>;
using vb = vector<bool>; using vvb = vector<vb>;
using vpi = vector<pii>; using vvpi = vector<vpi>;
using vpl = vector<pll>; using vvpl = vector<vpl>;
const int inf = 1 << 30;
const ll INF = 1LL << 60;
#define rep(i,m,n) for (int i = m; i < (int)(n); i++)
#define rrep(i,m,n) for (int i = m; i > (int)(n); i--)

int main(){
    int n,q; cin >> n >> q;
    vi lamps(n);
    int ans = 0;
    rep(i,0,q){
        int l,r; cin >> l >> r; --l;
        rep(i,l,r){
            if (lamps[i]){
                --ans;
                lamps[i] = 0;
            }
            else{
                ++ans;
                lamps[i] = 1;
            }
        }
        cout << ans << endl;
    }
}