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