def main():
    n, q = map(int, input().split())

    ans = 0
    lamps = [0] * (n + 1)
    for _ in range(q):
        l, r = map(int, input().split())
        for i in range(l - 1, r):
            if lamps[i] == 0:
                ans += 1
                lamps[i] = 1
            elif lamps[i] == 1:
                ans -= 1
                lamps[i] = 0
        print(ans)


if __name__ == "__main__":
    main()