#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n, q;
  cin >> n >> q;
  vector<bool> now(n, false);
  int cnt = 0;
  while (q--) {
    int l, r;
    cin >> l >> r;
    for (int i = l - 1; i < r; i++) {
      now[i] = !now[i];
      if (now[i])
        cnt++;
      else
        cnt--;
    }
    cout << cnt << endl;
  }
  return 0;
}