n = int(input())
ans = 0
while n > 0:
    count = (n & 0x5555) + ((n >> 1) & 0x5555)
    count = (count & 0x3333) + ((count >> 2) & 0x3333)
    count = (count & 0x0f0f) + ((count >> 4) & 0x0f0f)
    ans += (count & 0x00ff) + ((count >> 8) & 0x00ff)
    n >>= 16
print(ans)