import sys
input=sys.stdin.readline
write=sys.stdout.write
N,Q=map(int,input().split())
X=[0]*(N+1)
Ans=[]

S=0
for _ in range(Q):
    L,R=map(int,input().split())
    delta=0
    for k in range(L,R+1):
        if X[k]==0:
            delta+=1
        else:
            delta-=1
        X[k]^=1
    S+=delta
    Ans.append(S)

write("\n".join(map(str,Ans)))