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给定一个整数数组 nums ,找到一个具有最大和的连续子数组(子数组最少包含一个元素),返回其最大和。
示例:
输入: [-2,1,-3,4,-1,2,1,-5,4],
输出: 6
解释: 连续子数组 [4,-1,2,1] 的和最大,为 6。
Find the contiguous subarray within an array (containing at least one number) which has the largest sum.
For example, given the array [−2,1,−3,4,−1,2,1,−5,4],
the contiguous subarray [4,−1,2,1] has the largest sum = 6.
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class Solution(object):
def maxSubArray(self, nums):
"""
:type nums: List[int]
:rtype: int
"""
if len(nums) == 0:
return 0
#设2个变量用于存储
Sum = MaxSum = nums[0]
for i in range(1,len(nums)):
Sum = max(Sum+nums[i], nums[i])
#如果Sum+nums[i]比nums[i]还小,就舍弃。令nums[i]为Sum
MaxSum = max(MaxSum, Sum)
#2次递归
return MaxSum