diff --git a/best-time-to-buy-and-sell-stock/mandel-17.py b/best-time-to-buy-and-sell-stock/mandel-17.py
new file mode 100644
index 0000000000..9c2fb23e0b
--- /dev/null
+++ b/best-time-to-buy-and-sell-stock/mandel-17.py
@@ -0,0 +1,20 @@
+from typing import List
+
+class Solution:
+    def maxProfit(self, prices: List[int]) -> int:
+        min_price = prices[0]
+        max_price = prices[0]
+        temp_min = prices[0]
+        diff = 0
+        for price in prices:
+            temp_diff = price - temp_min
+            if temp_diff < 0:
+                temp_min = price
+            elif temp_diff > diff:
+                max_price = price
+                min_price = temp_min
+                diff = temp_diff
+            else:
+                continue
+        return diff
+
diff --git a/group-anagrams/mandel-17.py b/group-anagrams/mandel-17.py
new file mode 100644
index 0000000000..eb7103e96a
--- /dev/null
+++ b/group-anagrams/mandel-17.py
@@ -0,0 +1,10 @@
+import collections
+from typing import List
+
+class Solution:
+    def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
+        result = collections.defaultdict(list)
+        for s in strs:
+            result[''.join(sorted(s))].append(s)                
+        return list(result.values())      
+