''' 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. '''

for i in range(1,len(a)):
    a[i]=max(a[i],a[i]+a[i-1])
print(max(a))
