feat: add two sum solution

Author: mangodm-web

two-sum/mangodm-web.py

@@ -0,0 +1,13 @@
+from typing import List
+
+
+class Solution:
+    def twoSum(self, nums: List[int], target: int) -> List[int]:
+        index_map = {}
+
+        for i, n in enumerate(nums):
+            complement = target - n
+
+            if complement in index_map:
+                return [index_map[complement], i]
+            index_map[n] = i