init: hot100 algo project with .gitignore

01-two-sum/solution.py

@@ -0,0 +1,15 @@
+from typing import List
+
+class Solution:
+    def twoSum(self, nums: List[int], target: int) -> List[int]:
+        hash = {}
+        for i, num in enumerate(nums):
+            another = target - num
+            if another in hash:
+                return [hash[another], i]
+            hash[num] = i
+
+
+if __name__ == "__main__":
+    res = Solution().twoSum([2,7,11,15], 9)
+    print(res)