#!/usr/bin/env python3
# from typing import *

import sys
import io
import math
import collections
import decimal
import itertools
import bisect
import heapq


def input():
    return sys.stdin.readline()[:-1]


# sys.setrecursionlimit(1000000)

# _INPUT = """# paste here...
# """
# sys.stdin = io.StringIO(_INPUT)

INF = 10**10



N, Q = map(int, input().split())
T = [0] * (N+1)
n = 0
for _ in range(Q):
    l, r = map(int, input().split())
    for i in range(l, r+1):
        if T[i] == 0:
            T[i] = 1
            n += 1
        else:
            T[i] = 0
            n -= 1
    print(n)