Implement FreqStack, a class which simulates the operation of a stack-like data structure. FreqStack has two functions: push(int x), which pushes an integer xonto the stack. pop(), which removes and returns the most frequent element in the stack. If…

题目链接:https://leetcode.com/problems/maximum-frequency-stack/ 题意:实现一种数据结构FreqStack,FreqStack需要实现两个功能: push(int x) : 将x放入栈中 pop(): 移除并返回栈中出现次数最多的元素,若果该元素不唯一,返回离栈顶最近的 思路:维护一个set,set中存储元素值,以及一个包含该元素在原栈中的出现次序的栈,排序先按照set中栈的大小排序,栈大小相同则按照栈顶元素大小排序.push若该元素不在se…

[LeetCode]895. Maximum Frequency Stack 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/maximum-frequency-stack/description/ 题目描述: Implement FreqStack, a class which simulates the operation of a…

Implement FreqStack, a class which simulates the operation of a stack-like data structure. FreqStack has two functions: push(int x), which pushes an integer x onto the stack. pop(), which removes and returns the most frequent element in the stack. If…

2018-10-06 22:01:11 问题描述: 问题求解: 为每个频率创建一个栈即可. class FreqStack { Map<Integer, Integer> map; List<Stack<Integer>> stacks; public FreqStack() { map = new HashMap<>(); stacks = new ArrayList<>(); } public void push(int x) { int f…

Implement FreqStack, a class which simulates the operation of a stack-like data structure. FreqStack has two functions: push(int x), which pushes an integer x onto the stack. pop(), which removes and returns the most frequent element in the stack. If…

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…

Implement FreqStack, a class which simulates the operation of a stack-like data structure. FreqStack has two functions: push(int x), which pushes an integer x onto the stack. pop(), which removes and returns the most frequent element in the stack. If…

话说博主在写Max Chunks To Make Sorted II这篇帖子的解法四时,写到使用单调栈Monotone Stack的解法时,突然脑中触电一般,想起了之前曾经在此贴LeetCode All in One 题目讲解汇总(持续更新中...)的留言区中说要写单调栈的总结帖,当时答应了要写,就去LeetCode上看标记为Stack的题,可是发现有好多题,而且很多用的不是单调栈,于是博主一个一个的看了起来,但是无奈太多了,一直没有时间全部看完,就一直没有动笔写.虽说时间就像那啥,挤挤总会有的…

946. Validate Stack Sequences 题目描述 Given two sequences pushed and popped with distinct values, return true if and only if this could have been the result of a sequence of push and pop operations on an initially empty stack. 示例 示例1 Input: pushed = [1,…