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

int main() {
  int n, q;
  cin >> n >> q;
  vector<int> a(n, 0);
  int sum = 0;
  while (q--) {
    int l, r;
    cin >> l >> r, l--;
    for (int i = l; i < r; i++) {
      sum -= a[i];
      a[i] ^= 1;
      sum += a[i];
    }
    cout << sum << "\n";
  }
}