53. Maximum Subarray@python
Given an integer array nums
, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum.
Example:
Input: [-2,1,-3,4,-1,2,1,-5,4],
Output: 6
Explanation: [4,-1,2,1] has the largest sum = 6.
Follow up:
If you have figured out the O(n) solution, try coding another solution using the divide and conquer approach, which is more subtle.
题目地址: Maximum Subarray
难度: Easy
思路: 最大子序列和问题
代码:
class Solution(object):
def maxSubArray(self, nums):
"""
:type nums: List[int]
:rtype: int
"""
n = len(nums)
tmp = 0
res = float('-inf')
for i in range(n):
if tmp < 0:
tmp = 0
tmp = tmp + nums[i]
res = max(res, tmp)
return res
时间复杂度: O(n)
空间复杂度: O(1)
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