Python/other/largest_subarray_sum.py
anubhav-sharma13 ce7faa5a3a Largest subarray sum (#1404)
* Insertion_sort

* largest subarray sum

* updated print command

* removed extraspaces

* removed sys.maxint

* added explaination

* Updated function style

* Update largest_subarray_sum.py

* Update i_sort.py

* Delete bogo_bogo_sort.py
2019-10-22 09:30:11 +02:00

24 lines
678 B
Python

from sys import maxsize
def max_sub_array_sum(a: list, size: int = 0):
"""
>>> max_sub_array_sum([-13, -3, -25, -20, -3, -16, -23, -12, -5, -22, -15, -4, -7])
-3
"""
size = size or len(a)
max_so_far = -maxsize - 1
max_ending_here = 0
for i in range(0, size):
max_ending_here = max_ending_here + a[i]
if max_so_far < max_ending_here:
max_so_far = max_ending_here
if max_ending_here < 0:
max_ending_here = 0
return max_so_far
if __name__ == "__main__":
a = [-13, -3, -25, -20, 1, -16, -23, -12, -5, -22, -15, -4, -7]
print(("Maximum contiguous sum is", max_sub_array_sum(a, len(a))))