def countOne(number):
    counter = 0
    while number:
        counter += (number & 1)
        number >>= 1
    return counter


print(countOne(11))

a3a9a4a4122873f7474dae6a58272c49f3dff900
<mask token>

def countOne(number):
    counter = 0
    while number:
        counter += number & 1
        number >>= 1
    return counter


<mask token>

def countOne(number):
    counter = 0
    while number:
        counter += number & 1
        number >>= 1
    return counter


print(countOne(11))

def countOne(number):
    counter = 0
    while number:
        counter += (number & 1)
        number >>= 1
    return counter


print(countOne(11))
