diff --git a/problems/0860.柠檬水找零.md b/problems/0860.柠檬水找零.md
index cd52adb0..d96e0879 100644
--- a/problems/0860.柠檬水找零.md
+++ b/problems/0860.柠檬水找零.md
@@ -115,6 +115,9 @@ public:
     }
 };
 ```
+* 时间复杂度: O(n)
+* 空间复杂度: O(1)
+
 
 ## 总结