n = int(input())
count = 0
k = 0
while (1 << k) <= n:
    two_k = 1 << k
    two_k_plus_1 = two_k << 1
    blocks = (n + 1) // two_k_plus_1
    count += blocks * two_k
    remainder = (n + 1) % two_k_plus_1
    if remainder > two_k:
        count += remainder - two_k
    k += 1
print(count)