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): """ :rtype: nothing """ self.peek() self.outStack....
classMyQueue{privateStack<Integer> s1;privateStack<Integer> s2;/** Initialize your data structure here. */publicMyQueue(){ s1 =newStack<>(); s2 =newStack<>(); }/** Push element x to the back of queue. */publicvoidpush(intx){while(!s1.isEmpty()) { s2.push(s1.pop()); } s...
232. Implement Queue using Stacks 题目: https://leetcode.com/problems/implement-queue-using-stacks/ 难度: Easy 这个题没有乖乖听话,因为当年做过用两个stack来模拟queue 然后不得不说,我Python大法实在太厉害了 这功能强大的,我简直要啧啧啧 classQueue(object):def__init__(self):""" initialize your d...
template <typename T> class CQueue { public: CQueue(void); ~CQueue(void); void appendTail(const T& node); T deleteHead(); private: stack<T> stack1; stack<T> stack2; }; template<typename T> void CQueue<T>::appendTail(const T& element) { stack1.push(element); } template<typenam...
Typically, the last person to arrive will stand at the end of the queue. The person at the beginning of the queue will leave it as soon as a table is available. Here’s how you can emulate the process using a bare-bones deque object: Python >>> from collections import deque >>> ...
It has a different space utilization, but if you implement it just like BFS, but using a stack rather than a queue, you will use more space than non-recursive DFS. Why more space? Consider this: // From non-recursive "DFS" for (auto i&: adjacent) { if (!visited(i...
Understanding queue data structure Stacks and queues December 8 - Cheating Probability Problem Given an RxC Matrix in which each element represents the Department of a student seated in that row and column in an examination hall, write a code to calculate the probability of each student copying if...
Python解法一: classQueue: # initialize your data structure here. def__init__(self): self.inStack=[] self.outStack=[] # @param x, an integer # @return nothing defpush(self,x): self.inStack.append(x) # @return nothing defpop(self): ...
Implement Queue using Stacks 用栈实现队列 使用栈实现队列的下列操作: push(x) – 将一个元素放入队列的尾部。 pop() – 从队列首部移除元素。 peek() – 返回队列首部的元素。 empty() – 返回队列是否为空。 示例: MyQueue queue = new MyQueue(); queue.pu... ...
【LeetCode题解】232_用栈实现队列(Implement-Queue-using-Stacks) 目录 描述 解法一:在一个栈中维持所有元素的出队顺序 思路 入队(push) 出队(pop) 查看队首(peek) 是否为空(empty) Java 实现 Python 实现 解法二:一个栈入,一个栈出 思路 入队(push) 出队(pop) 查看队首(peek) 是否为空(empty) ...