From 93ab9befe85fdd3056765b3414b8b442a7f2258d Mon Sep 17 00:00:00 2001
From: Chenxue3 <115330251+XueshanChen@users.noreply.github.com>
Date: Sat, 6 Jan 2024 23:51:02 +1300
Subject: [PATCH] =?UTF-8?q?Update=200225.=E7=94=A8=E9=98=9F=E5=88=97?=
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---
 problems/0225.用队列实现栈.md | 51 +++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/problems/0225.用队列实现栈.md b/problems/0225.用队列实现栈.md
index d89bf44b..6900e668 100644
--- a/problems/0225.用队列实现栈.md
+++ b/problems/0225.用队列实现栈.md
@@ -1046,6 +1046,8 @@ class MyStack() {
 
 ### C#:
 
+> 双队列
+
 ```csharp
 public class MyStack {
     Queue<int> queue1;
@@ -1080,6 +1082,54 @@ public class MyStack {
 }
 ```
 
+> 单队列
+
+```c#
+/*
+ * @lc app=leetcode id=225 lang=csharp
+ * 版本二：单队列
+ * [225] Implement Stack using Queues
+ */
+
+// @lc code=start
+public class MyStack {
+    Queue<int> myQueue;
+    public MyStack() {
+        myQueue = new Queue<int>();
+    }
+    
+    public void Push(int x) {
+        myQueue.Enqueue(x);
+    }
+    
+    //使用一个队列实现
+    public int Pop() {
+        //一个队列在模拟栈弹出元素的时候只要将队列头部的元素（除了最后一个元素外） 重新添加到队列尾部，此时再去弹出元素就是栈的顺序了。
+        for (var i = 0; i < myQueue.Count-1; i++)
+        {
+            myQueue.Enqueue(myQueue.Dequeue());
+        }
+        return myQueue.Dequeue();
+    }
+
+    //复用Pop()的代码
+    public int Top() {
+        int res = Pop();
+        myQueue.Enqueue(res);
+        return res;
+    }
+    
+    public bool Empty() {
+        return (myQueue.Count == 0);
+    }
+}
+
+// @lc code=end
+
+```
+
+
+
 ### PHP:
 
 > 双队列
@@ -1203,3 +1253,4 @@ impl MyStack {
 <a href="https://programmercarl.com/other/kstar.html" target="_blank">
   <img src="../pics/网站星球宣传海报.jpg" width="1000"/>
 </a>
+