# https://yukicoder.me/problems/no/1673
# No.1673 Lamps on a line

# LRの幅が狭いので都度見ていく

N, Q = map(int, input().split())
LR = [list(map(int, input().split())) for _ in range(Q)]

lamp = [0] * N
cnt = 0
for l, r in LR:
    for i in range(l - 1, r):
        if lamp[i] == 0:
            cnt += 1
        else:
            cnt -= 1
        lamp[i] ^= 1
    print(cnt)