Create maximum-sum-score-of-array.py

Author: kamyu104

Python/maximum-sum-score-of-array.py

@@ -0,0 +1,37 @@
+# Time:  O(n)
+# Space: O(1)
+
+# prefix sum, math
+class Solution(object):
+    def maximumSumScore(self, nums):
+        """
+        :type nums: List[int]
+        :rtype: int
+        """
+        prefix = suffix = 0
+        result = float("-inf")
+        right = len(nums)-1
+        for left in xrange(len(nums)):
+            prefix += nums[left]
+            suffix += nums[right]
+            right -= 1
+            result = max(result, prefix, suffix)
+        return result
+
+    
+# Time:  O(n)
+# Space: O(1)
+# prefix sum
+class Solution2(object):
+    def maximumSumScore(self, nums):
+        """
+        :type nums: List[int]
+        :rtype: int
+        """
+        total = sum(nums)
+        prefix = 0
+        result = float("-inf")
+        for x in nums:
+            prefix += x
+            result = max(result, prefix, total-prefix+x)
+        return result