def main():
	import sys
	input = sys.stdin.buffer.readline
	n, q = map(int, input().split())
	lis = [0] * n
	s = 0
	for _ in range(q):
		l, r = map(int, input().split())
		for i in range(l - 1, r):
			lis[i] ^= 1
			if lis[i]: s += 1
			else: s -= 1
		print(s)
if __name__ == '__main__':
	main()