Create maximum-alternating-subsequence-sum.py

Author: kamyu104

Python/maximum-alternating-subsequence-sum.py

@@ -0,0 +1,13 @@
+# Time:  O(n)
+# Space: O(1)
+
+class Solution(object):
+    def maxAlternatingSum(self, nums):
+        """
+        :type nums: List[int]
+        :rtype: int
+        """
+        result = nums[0]
+        for i in xrange(len(nums)-1):
+            result += max(nums[i+1]-nums[i], 0)
+        return result