diff --git a/medium/best_time_to_buy_and_sell_stock_ii.py b/medium/best_time_to_buy_and_sell_stock_ii.py
new file mode 100644
index 0000000..09fc939
--- /dev/null
+++ b/medium/best_time_to_buy_and_sell_stock_ii.py
@@ -0,0 +1,13 @@
+# https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii
+
+from typing import List
+
+class Solution:
+    def maxProfit(self, prices: List[int]) -> int:
+        result = 0
+        last = prices[0]
+        for i in range(1, len(prices)):
+            if last < prices[i]:
+                result += prices[i] - last
+            last = prices[i]
+        return result