#include <iostream>
#include <vector>
#include <algorithm>
#include <atcoder/segtree>
#include <atcoder/lazysegtree>
using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(n); i++)




int main(){
  int N,Q; cin >> N >> Q;
  vector<int> A(N,0);
  int ans = 0;
  rep(i,Q){
    int l,r; cin >> l >> r; l--;
    for(int p=l; p<r; p++){
      ans -= A[p];
      A[p] ^= 1;
      ans += A[p];
    }
    cout << ans << "\n";
  }
  return 0;
}




struct ios_do_not_sync {
    ios_do_not_sync() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} ios_do_not_sync_instance;