diff --git "a/leetcode3/\354\235\264\354\247\204\355\235\254/121. Best Time to Buy and Sell Stock.java" "b/leetcode3/\354\235\264\354\247\204\355\235\254/121. Best Time to Buy and Sell Stock.java"
new file mode 100644
index 00000000..8918570a
--- /dev/null
+++ "b/leetcode3/\354\235\264\354\247\204\355\235\254/121. Best Time to Buy and Sell Stock.java"	
@@ -0,0 +1,13 @@
+class Solution {
+    public int maxProfit(int[] prices) {
+        int minPrice = Integer.MAX_VALUE;
+        int maxProfit = 0;
+
+        for (int price : prices) {
+            if (price < minPrice) minPrice = price;
+            else if (price - minPrice > maxProfit) maxProfit = price - minPrice;
+        }
+
+        return maxProfit;
+    }
+}
\ No newline at end of file