#include <bits/stdc++.h>
using namespace std;
#define REP(i, m, n) for (int i = m; i < (int)(n); ++i)
#define rep(i, n) REP(i, 0, n)
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

int main()
{
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  int n, q;
  cin >> n >> q;
  int a[500010] = {};
  rep(i, q)
  {
    int l, r;
    cin >> l >> r;
    l--;
    int sum = 0;
    REP(j, l, r)
    a[j] ^= 1;
    rep(j, n) sum += a[j];
    cout << sum << "\n";
  }
}