upd

org/study_deck_02/dsa/arrays-hashing/0001-two-sum.org

@@ -57,6 +57,12 @@ Write your approach here.
 #+begin_src python
 class Solution:
     def twoSum(self, nums: List[int], target: int) -> List[int]:
+        sb = {}
+        for xi, x in enumerate(nums):
+            want = target - x;
+            if want in sb:
+                return sb[want], xi
+            sb[x] = xi
 #+end_src
 
 ** TODO C++