A=[]
i=0
Q=0
l=0
r=0
k=0
s=0
n,q=map(int,input().split())
for i in range(0,n,1):
    A.append(0)
a=list(map(int,A))
for Q in range(0,q,1):
    l,r=map(int,input().split())
    for k in range(l-1,r,1):
        a[k]+=1
    print(sum([p%2 != 0 for p in a]))