Create kadane.py

Algorithms/kadane.py

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+# Python program to print largest contiguous array sum
+
+from sys import maxsize
+
+# Function to find the maximum contiguous subarray
+# and print its starting and end index
+
+
+def maxSubArraySum(a, size):
+
+	max_so_far = -maxsize - 1
+	max_ending_here = 0
+	start = 0
+	end = 0
+	s = 0
+
+	for i in range(0, size):
+
+		max_ending_here += a[i]
+
+		if max_so_far < max_ending_here:
+			max_so_far = max_ending_here
+			start = s
+			end = i
+
+		if max_ending_here < 0:
+			max_ending_here = 0
+			s = i+1
+
+	print("Maximum contiguous sum is %d" % (max_so_far))
+	print("Starting Index %d" % (start))
+	print("Ending Index %d" % (end))
+
+
+# Driver program to test maxSubArraySum
+a = [-2, -3, 4, -1, -2, 1, 5, -3]
+maxSubArraySum(a, len(a))