Finish problem 0001-two-sum

problems/0001-two-sum/solution.py

@@ -0,0 +1,8 @@
+class Solution:
+    def twoSum(self, nums: list[int], target: int) -> list[int]:
+        hashmap = {}
+        for i, n in enumerate(nums):
+            if target - n in hashmap:
+                return [hashmap[target - n], i]
+            hashmap[n] = i
+        return []