import sys
input = lambda: sys.stdin.readline().rstrip()

#  -----------------------  #

n, q = map(int, input().split())
lr = [list(map(int, input().split())) for _ in range(q)]

now = 0
lamp = [0] * (n+1)
for l,r in lr:
  for i in range(l, r+1):
    lamp[i] += 1
    lamp[i] %= 2
    if lamp[i]:
      now += 1
    else:
      now -= 1
  print(now)