def main():
    n,q = map(int,input().split())
    lump = [0]*n
    ans = 0
    for i in range(q):
        l,r = map(int,input().split())
        l,r = l-1,r-1
        for j in range(l,r+1):
            if lump[j] == 0:
                lump[j] = 1
                ans += 1
            else:
                lump[j] = 0
                ans -= 1
        print(ans)
        
if __name__ == '__main__':
    main()