diff --git a/easy/121 Best Time to Buy and Sell Stock/Solution.py b/easy/121 Best Time to Buy and Sell Stock/Solution.py
new file mode 100644
index 0000000..146ce19
--- /dev/null
+++ b/easy/121 Best Time to Buy and Sell Stock/Solution.py	
@@ -0,0 +1,14 @@
+class Solution:
+    def maxProfit(self, prices: List[int]) -> int:
+        max_profit = 0
+        buy_index = 0
+        if len(prices) == 1:
+            return 0
+        for i, cur_price in enumerate(prices):
+            profit = cur_price - prices[buy_index]
+            if profit > max_profit:
+                max_profit = profit
+            elif cur_price < prices[buy_index]:
+                buy_index = i
+
+        return max_profit