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ff14185 Jul 15, 2018
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@kamyu104 @jarrekk @cclauss
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from __future__ import print_function
# Time: O(n)
# Space: O(1)
# Given an array nums, write a function to move all 0's
# to the end of it while maintaining the relative order
# of the non-zero elements.
#
# For example, given nums = [0, 1, 0, 3, 12], after
# calling your function, nums should be [1, 3, 12, 0, 0].
#
# Note:
# You must do this in-place without making a copy of the array.
# Minimize the total number of operations.
class Solution(object):
def moveZeroes(self, nums):
"""
:type nums: List[int]
:rtype: void Do not return anything, modify nums in-place instead.
"""
pos = 0
for i in xrange(len(nums)):
if nums[i]:
nums[i], nums[pos] = nums[pos], nums[i]
pos += 1
def moveZeroes2(self, nums):
"""
:type nums: List[int]
:rtype: void Do not return anything, modify nums in-place instead.
"""
nums.sort(cmp=lambda a, b: 0 if b else -1)
class Solution2(object):
def moveZeroes(self, nums):
"""
:type nums: List[int]
:rtype: void Do not return anything, modify nums in-place instead.
"""
pos = 0
for i in xrange(len(nums)):
if nums[i]:
nums[pos] = nums[i]
pos += 1
for i in xrange(pos, len(nums)):
nums[i] = 0
if __name__ == '__main__':
s = Solution()
r = s.moveZeroes([0, 1, 0, 3, 12])
print(r)