self.q.put(self.top_element)returnself.q.get()deftop(self) ->int:returnself.top_elementdefempty(self) ->bool:returnself.q.qsize() == 0 1classMyStack {2private: queue<int>q;3public:4/** Initialize your data structure here.*/5MyStack() {67}89/** Push element x onto stack.*/...
empty() -- Return whether the stack is empty. 我的解法一,python使用collections.deque() classStack(object): def __init__(self):"""initialize your data structure here."""self.queue =collections.deque() def push(self, x):""":type x:int:rtype: nothing"""self.queue.append(x) def pop...
我们可以边删除边添加。 classMyStack{Queue<Integer>queue;/** Initialize your data structure here. */publicMyStack(){queue=newLinkedList<>();}/** Push element x onto stack. */publicvoidpush(intx){queue.offer(x);}/** Removes the element on top of the stack and returns that element. *...
empty() – Return whether the stack is empty. Example : MyStack stack=newMyStack();stack.push(1);stack.push(2);();// returns 2stack.pop();// returns 2stack.empty();// returns false 1. 2. 3. 4. 5. 6. 7. Note: You must use only standard operations of a queue – which m...
empty() -- Return whether the stack is empty. Notes: You must use only standard operations of a queue -- which means only push to back , peek/pop from front , size , and is empty Depending on your language, queue may not be supported natively. You may simulate a queue by using a...
然后可以用Queue来完成。 reference: https://leetcode.com/articles/implement-stack-using-queues/#approach-1-two-queues-push-o1-pop-on 还有种O(1)的方法,太偏门了。 https://discuss.leetcode.com/topic/15961/o-1-purely-with-queues Anyway, Good luck, Richardo! -- 09/11/2016...
one queue的思路: push之后,把queue的在push之前的元素都一一poll, 再add到末尾。 publicclassMyStack{Queue<Integer>queue;/** Initialize your data structure here. */publicMyStack(){queue=newLinkedList<Integer>();}/** Push element x onto stack. */publicvoidpush(intx){queue.add(x);for(inti=0...
Okay, if you’re threading, you can’t uselistfor a stack and you probably don’t want to usedequefor a stack, so howcanyou build a Python stack for a threaded program? The answer is in thequeuemodule,queue.LifoQueue. Remember how you learned that stacks operate on the Last-In/First...
include<iostream>include<fstream>include<string>include<vector>include<list>include<deque>include<algorithm>include<stack>include<queue>include<utility>include <sstream>includeusing namespace std;chuangjian();mima(int jk);zidianlujing();xuanzemoshi(map<string,string> pp,string name);lianxu...
Reexecutethetransactionfromtheerrorqueue.***ORA-01013NotesORA-06550ErroronApplyAnORA-06550error:Indicatesanerrorwithinanapplyhandlerortransformationfunction.Typicallycausestheapplyprocesstoabortwithnoerrorsintheerrorqueue.Thetracefilefortheapplycoordinatorwillreportthefullerrorstack.ORA-12801inSTREAMSprocessORA-12801:...