import sys
#sys.setrecursionlimit(10 ** 6)
INF = float('inf')
#10**20,2**63に変えるのもあり
MOD = 10**9 + 7
MOD2 = 998244353
from collections import defaultdict
def solve():
    def II(): return int(sys.stdin.readline())
    def LI(): return list(map(int, sys.stdin.readline().split()))
    def LC(): return list(input())
    def IC(): return [int(c) for c in input()]
    def MI(): return map(int, sys.stdin.readline().split())
    N,Q = MI()
    Lump = [0]*(N+1)
    Ans = 0
    for q in range(Q):
        L,R = MI()
        for i in range(L,R+1):
            if not Lump[i]:
                Ans += 1
            else:
                Ans -=1
            Lump[i] = (Lump[i]+1)%2
        print(Ans)
    return
solve()