https://leetcode-cn.com/problems/implement-queue-using-stacks/ 问题描述 请你仅使用两个栈实现先入先出队列。队列应当支持一般队列支持的所有操作(push、pop、peek、empty): 实现MyQueue 类: void push(int x) 将元素 x 推到队列的末尾 int pop() 从队列的开头移除并返回元素 int peek() 返回队列开头的...
classMyQueue{privateStack<Integer> stack;/** Initialize your data structure here. */publicMyQueue(){ stack =newStack<Integer>(); }/** Push element x to the back of queue. */publicvoidpush(intx){ stack.push(x); }/** Removes the element from in front of queue and returns that elem...
225. 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
Implement the following operations of a queue using stacks. push(x) — Push element x to the back of queue. pop() — Removes the element from in front of queue. peek() — Get the front element. empty() — Return whether the queue is empty. Java Solution classMyQueue{Stack<Integer>te...
packageleetcodetypeMyQueuestruct{Stack*[]intQueue*[]int}/** Initialize your data structure here. */funcConstructor232()MyQueue{tmp1,tmp2:=[]int{},[]int{}returnMyQueue{Stack:&tmp1,Queue:&tmp2}}/** Push element x to the back of queue. */func(this*MyQueue)Push(xint){*this.Stack=...
0232-Implement-Queue-using-Stacks 0234-Palindrome-Linked-List 0235-Lowest-Common-Ancestor-of-a-Binary-Search-Tree 0236-Lowest-Common-Ancestor-of-a-Binary-Tree 0237-Delete-Node-in-a-Linked-List 0239-Sliding-Window-Maximum 0242-Valid-Anagram 0243-Shortest-Word-Distance 0244-...
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...
packageleetcodetypeTriestruct{isWordboolchildrenmap[rune]*Trie}/** Initialize your data structure here. */funcConstructor208()Trie{returnTrie{isWord:false,children:make(map[rune]*Trie)}}/** Inserts a word into the trie. */func(this*Trie)Insert(wordstring){parent:=thisfor_,ch:=rangeword{...
0232-Implement-Queue-using-Stacks 0234-Palindrome-Linked-List 0235-Lowest-Common-Ancestor-of-a-Binary-Search-Tree 0236-Lowest-Common-Ancestor-of-a-Binary-Tree 0237-Delete-Node-in-a-Linked-List 0239-Sliding-Window-Maximum 0242-Valid-Anagram 0243-Shortest-Word-Distance 0244-...
class Queue(object): def __init__(self): """ initialize your data structure here. """ self.inStack=[] self.outStack=[] def push(self, x): """ :type x: int :rtype: nothing """ self.inStack.append(x) def pop(self): ...