Problem 1 and 2

0001-two-sum/solution.py

@@ -0,0 +1,9 @@
+class Solution:
+    def twoSum(self, nums: List[int], target: int) -> List[int]:
+        dic = {}
+        for i, val in enumerate(nums):
+            if target - val in dic:
+                return [dic[target - val], i]
+            else:
+                dic[val] = i
+