import sys
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)
U = 10 ** 5

N, Q = map(int, input().split())
ans = 0
lamp = [0] * (N + 1)
for _ in range(Q):
    L, R = map(int, input().split())
    for i in range(L, R+1):
        lamp[i] ^= 1
        if lamp[i]:
            ans += 1
        else:
            ans -= 1
    print(ans)