def activityNotifications(expenditure, d):
    counts = [0] * 200
    exp = expenditure

    for x in exp[:d]:
        counts[x] += 1

    def M():
        total_left = 0
        for l in range(200):
            total_left += counts[l]
            if total_left > d - total_left:
                return l
            elif total_left == d - total_left:
                r = l + 1
                while not counts[r]: 
                    r += 1
                return (l + r) / 2.

    res = 0
    for i in range(d, len(exp)):
        res += (exp[i] >= M() * 2)
        counts[exp[i-d]] -= 1
        counts[exp[i]] += 1
        
    return res