【leetcode❤python】 155. Min Stack

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【leetcode❤python】 155. Min Stack

#-*- coding: UTF-8 -*- class MinStack(object): def __init__(self): """ initialize your data structure here. """ self.Stack=[] self.minStack=[] def push(self, x): "&…

【leetcode❤python】 225. Implement Stack using Queues

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【leetcode❤python】Sum Of Two Number

#-*- coding: UTF-8 -*- #既然不能使用加法和减法,那么就用位操作.下面以计算5+4的例子说明如何用位操作实现加法:#1. 用二进制表示两个加数,a=5=0101,b=4=0100:#2. 用and(&)操作得到所有位上的进位carry=0100;#3. 用xor(^)操作找到a和b不同的位,赋值给a,a=0001:#4. 将进位carry左移一位,赋值给b,b=1000:#5. 循环直到进位carry为0,此时得到a=1001,即最后的sum.#!!!!!!关于负数的运算.…

【LeetCode】155. Min Stack 最小栈 (Python&C++)

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录题目描述解题方法栈同时保存当前值和最小值辅助栈同步栈不同步栈日期题目地址:https://leetcode.com/problems/min-stack/description/ 题目描述 Design a stack that supports push, pop, top, and retrieving the minimum element in constan…

【leetcode】155 - Min Stack

Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push element x onto stack. pop() -- Removes the element on top of the stack. top() -- Get the top element. getMin() -- Retrieve the minimum e…

【一天一道LeetCode】#155. Min Stack

一天一道LeetCode 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博欢迎转载,转载请注明出处 (一)题目 Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) – Push element x onto stack. pop() – Removes the el…

<LeetCode OJ> 155. Min Stack

Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push element x onto stack. pop() -- Removes the element on top of the stack. top() -- Get the top element. getMin() -- Retrieve the minimum e…