diff --git "a/leetcode3/\354\265\234\353\257\274\354\247\200/121.py" "b/leetcode3/\354\265\234\353\257\274\354\247\200/121.py"
new file mode 100644
index 00000000..45b0ef7f
--- /dev/null
+++ "b/leetcode3/\354\265\234\353\257\274\354\247\200/121.py"
@@ -0,0 +1,11 @@
+class Solution:
+    def maxProfit(self, prices: List[int]) -> int:
+        min_price = prices[0]
+        max_profit = 0
+        for price in prices:
+            if price < min_price:
+                min_price = price
+            elif price - min_price > max_profit:
+                max_profit = price - min_price
+        return max_profit
+        
\ No newline at end of file