#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;

int main() {
  int N, Q; cin >> N >> Q;
  vector<int> S(N, 0);
  int ans = 0;
  for(int i = 0; i < Q; i++){
    int L, R; cin >> L >> R;
    for(int i = L-1; i <= R-1; i++){
      S[i] = (S[i]+1)%2;
      if(S[i] == 1) ans++;
      else ans--;
    }
    cout << ans << endl;
  }
}