[leetcode DP]53. Maximum Subarray

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.

 1 class Solution(object):
 2     def maxSubArray(self, nums):
 3         thissum,maxsum = 0,-9999999999999
 4         for v in nums:
 5             thissum += v
 6             if thissum>maxsum:
 7                 maxsum = thissum
 8             if thissum<0:
 9                 thissum = 0
10         return maxsum

1 class Solution(object):
2     def maxSubArray(self, nums):
3         thissum=maxsum = nums[0]
4         for v in nums[1:]:
5             thissum = max(v,v+thissum)
6             maxsum = max(maxsum,thissum)
7         return maxsum