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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>
#define LP pair<ll, ll>
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define all(s) s.begin(), s.end()
#define rall(s) s.rbegin(), s.rend()
template<class T>
void chmax(T& a, T b) { a = max(a, b); };
template<class T>
void chmin(T& a, T b) { a = min(a, b); };

int main() {
  int n, q;
  cin >> n >> q;
  vector<int> a(n);
  int ans = 0;
  rep(qi,q) {
    int l, r;
    cin >> l >> r;
    l--, r--;
    for (int i = l; i <= r; i++) {
      if (a[i] == 0) {
        a[i] = 1;
        ans++;
      } else {
        a[i] = 0;
        ans--;
      }
    }
    cout << ans << "\n";
  }
  return 0;
}