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Max Sum Contiguous Subarray

Problem Description

Find the contiguous subarray within an array, A of length N which has the largest sum.

Problem Constraints
1 <= N <= 106
-1000 <= A[i] <= 1000

Input Format
The first and the only argument contains an integer array, A.

Output Format
Return an integer representing the maximum possible sum of the contiguous subarray.

Example Input
Input 1:
```A = [1, 2, 3, 4, -10]
```
Input 2:
```A = [-2, 1, -3, 4, -1, 2, 1, -5, 4]
```

Example Output
Output 1:
`10`
Output 2:
`6`

Example Explanation
Explanation 1:
```The subarray [1, 2, 3, 4] has the maximum possible sum of 10.
```
Explanation 2:
```The subarray [4,-1,2,1] has the maximum possible sum of 6.
```

NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a question? Checkout Sample Codes for more details.
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