N,Q = map(int,input().split())
switch = [0]*(N)
ans = 0

for i in range(Q):
    L,R = map(int,input().split())
    for j in range(L-1,R):
        if switch[j] == 0:
            switch[j] = 1
            ans += 1
        else:
            switch[j] = 0
            ans -= 1
    print(ans)