$ python threads.py Starting Threads... Press Ctrl+C to interrupt the execution Produced: 1 -> deque([1]) Consumed: 1 -> deque([]) Queue is empty Produced: 3 -> deque([3]) Produced: 0 -> deque([3, 0]) Consumed: 3 -> deque([0]) Consumed: 0 -> deque([]) Produced: 1 ...
stack.push(1); stack.push(2); stack.top();// returns 2stack.pop();// returns 2stack.empty();// returns false Notes: You must useonlystandard operations of a queue -- which means onlypush to back,peek/pop from front,size, andis emptyoperations are valid. Depending on your language...
importjava.util.NoSuchElementException;importjava.util.LinkedList;importjava.util.Queue;classMyStack{/** * The main queue using to store all the elements in the stack */privateQueue<Integer> q1;/** * The auxiliary queue using to implement `pop` operation */privateQueue<Integer> q2;/** * ...
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 ...
queue:2->1->3--->queue:1->3->2--->queue:3->2->1... 这样不管什么时候出队顺序都和出栈的顺序相同,并且题目要求实现的所有方法可直接套用队列的方法。 Java: 方法一 代码语言:javascript 复制 classMyStack{Queue<Integer>queue1;Queue<Integer>queue2;privateint top;//指向栈顶元素publicMyStack(...
Python: classStack: # initialize your data structure here. def__init__(self): self.queue=[] # @param x, an integer # @return nothing defpush(self,x): self.queue.append(x) # @return nothing defpop(self): forxinrange(len(self.queue)-1): ...
Collections.deque queue.LifoQueue Python Stack by Using List In Python, List is a built-in data structure that can be used as a Stack. We can use lists frequently to write the Python code. They are implemented as internal dynamic arrays i.e. whenever the element is inserted or deleted, ...
collections.deque queue.LifoQueue Using list to Create a Python Stack The built-in list structure that you likely use frequently in your programs can be used as a stack. Instead of .push(), you can use .append() to add new elements to the top of your stack, while .pop() removes the...
python代码: classMyStack(object):def__init__(self):""" Initialize your data structure here. """self.stack=[]defpush(self,x):""" Push element x onto stack. :type x: int :rtype: void """self.stack.append(x)defpop(self):""" ...
Theclassname of the Java function had been updated to MyStack instead of Stack. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Better Solution:Only push is O(n), others are O(1). Using one queue. 1classMyStack {2//Push element x onto stack.3Queue<Integer>queue;45publicMyStack...