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number &= number - 1 solution in Speedy category for Binary Count by Lemmi
def checkio(number):
result = 0
while number:
number &= number - 1
result += 1
return result
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert checkio(4) == 1
assert checkio(15) == 4
assert checkio(1) == 1
assert checkio(1022) == 9
July 31, 2017