规范格式

leetcode/0225.Implement-Stack-using-Queues/225. Implement Stack using Queues.go

@@ -0,0 +1,47 @@
+package leetcode
+
+type MyStack struct {
+	enque []int
+	deque []int
+}
+
+/** Initialize your data structure here. */
+func Constructor225() MyStack {
+	return MyStack{[]int{}, []int{}}
+}
+
+/** Push element x onto stack. */
+func (this *MyStack) Push(x int) {
+	this.enque = append(this.enque, x)
+}
+
+/** Removes the element on top of the stack and returns that element. */
+func (this *MyStack) Pop() int {
+	length := len(this.enque)
+	for i := 0; i < length-1; i++ {
+		this.deque = append(this.deque, this.enque[0])
+		this.enque = this.enque[1:]
+	}
+	topEle := this.enque[0]
+	this.enque = this.deque
+	this.deque = nil
+
+	return topEle
+}
+
+/** Get the top element. */
+func (this *MyStack) Top() int {
+	topEle := this.Pop()
+	this.enque = append(this.enque, topEle)
+
+	return topEle
+}
+
+/** Returns whether the stack is empty. */
+func (this *MyStack) Empty() bool {
+	if len(this.enque) == 0 {
+		return true
+	}
+
+	return false
+}

leetcode/0225.Implement-Stack-using-Queues/225. Implement Stack using Queues_test.go

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+package leetcode
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Test_Problem225(t *testing.T) {
+	obj := Constructor225()
+	fmt.Printf("obj = %v\n", obj)
+	param5 := obj.Empty()
+	fmt.Printf("param_5 = %v\n", param5)
+	obj.Push(2)
+	fmt.Printf("obj = %v\n", obj)
+	obj.Push(10)
+	fmt.Printf("obj = %v\n", obj)
+	param2 := obj.Pop()
+	fmt.Printf("param_2 = %v\n", param2)
+	param3 := obj.Top()
+	fmt.Printf("param_3 = %v\n", param3)
+	param4 := obj.Empty()
+	fmt.Printf("param_4 = %v\n", param4)
+}

leetcode/0225.Implement-Stack-using-Queues/README.md

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+# [225. Implement Stack using Queues](https://leetcode.com/problems/implement-stack-using-queues/)
+
+## 题目
+
+Implement the following operations of a stack using queues.
+
+- push(x) -- Push element x onto stack.
+- pop() -- Removes the element on top of the stack.
+- top() -- Get the top element.
+- empty() -- Return whether the stack is empty.
+
+Example :
+
+```c
+MyStack stack = new MyStack();
+
+stack.push(1);
+stack.push(2);  
+stack.top();   // returns 2
+stack.pop();   // returns 2
+stack.empty(); // returns false
+```
+
+Note:  
+
+- You must use only standard operations of a queue -- which means only push to back, peek/pop from front, size, and is empty operations are valid.
+- Depending on your language, queue may not be supported natively. You may simulate a queue by using a list or deque (double-ended queue), as long as you use only standard operations of a queue.
+- You may assume that all operations are valid (for example, no pop or top operations will be called on an empty stack).
+ 
+
+## 题目大意
+
+题目要求用队列实现一个栈的基本操作：push(x)、pop()、top()、empty()。
+
+
+## 解题思路
+
+按照题目要求实现即可。