import sys
from typing import List, Tuple


def int1(x: str, /): return int(x) - 1


def input(): return sys.stdin.readline().rstrip('\n')


def dbg(*args, **kwargs):
    print(*(repr(arg) for arg in args), *(f'{k}: {repr(v)}' for k, v in kwargs.items()), sep='; ', file=sys.stderr)


def main():
    n, q = map(int, input().split())
    a = [0] * n
    s = 0
    for _ in range(q):
        l, r = map(int, input().split())
        for i in range(l - 1, r):
            s -= a[i]
            a[i] = 1 - a[i]
            s += a[i]
        print(s)


def _start():
    ret = main()

    if ret is not None:
        if isinstance(ret, List) or isinstance(ret, Tuple):
            print(*ret)
        else:
            print(ret)


if __name__ == '__main__':
    _start()