#include <bits/stdc++.h>
using namespace std;
const int maxn = 5e5 + 10;
int a[maxn];
int main()
{
  int N, Q; cin >> N >> Q;
  
  while (Q --)
  {
    int l, r; scanf("%d %d", &l, &r);
    
    for (int i = l; i <= r; i ++)
    {
      if (a[i]) a[i] = 0;
      else a[i] = 1;
    }int cnt = 0;
    for (int i = 1; i <= N; i ++) if (a[i]) cnt ++; 
    cout << cnt << "\n";
  }
  
  return 0;
}