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# Time: O(logn)

# Space: O(1)

class Solution(object):

def brokenCalc(self, X, Y):

"""

:type X: int

:type Y: int

:rtype: int

"""

result = 0

while X < Y:

if Y%2:

Y += 1

else:

Y /= 2

result += 1

return result + X-Y