#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

int N, Q;
int A[505050];
int cnt;

int main() {
  cin >> N >> Q;
  for (int i = 1; i <= Q; i++) {
    int L, R; cin >> L >> R;
    for (int j = L; j <= R; j++) {
      if (A[j]) {
        A[j] = 0;
        cnt--;
      } else {
        A[j] = 1;
        cnt++;
      }
    }
    cout << cnt << endl;
  }
  return 0;
}