/* -*- coding: utf-8 -*-
 *
 * 1673.cc:  No.1673 Lamps on a line - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 500000;

/* typedef */

/* global variables */

int as[MAX_N];

/* subroutines */

/* main */

int main() {
  int n, qn;
  scanf("%d%d", &n, &qn);

  int sum = 0;
  while (qn--) {
    int l, r;
    scanf("%d%d", &l, &r);
    l--;

    for (int i = l; i < r; i++) {
      as[i] ^= 1;
      if (as[i]) sum++;
      else sum--;
    }

    printf("%d\n", sum);
  }

  return 0;
}