binary-prefix-divisible-by-5.py

# Time:  O(n)
# Space: O(1)

class Solution(object):
    def prefixesDivBy5(self, A):
        """
        :type A: List[int]
        :rtype: List[bool]
        """
        for i in xrange(1, len(A)):
            A[i] += A[i-1] * 2 % 5
        return [x % 5 == 0 for x in A]