Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the histogram. Above is a histogram where width of each bar is 1, given height = [2,1,5,6,2,3]. The largest…
3.1 Describe how you could use a single array to implement three stacks. 这道题让我们用一个数组来实现三个栈,书上给了两种方法,第一种方法是定长分割 Fixed Division,就是每个栈的长度相同,用一个公用的一位数组buffer来保存三个栈的内容,前三分之一为第一个栈,中间三分之一为第二个栈,后三分之一为第三个栈,然后还要分别记录各个栈当前元素的个数,然后再分别实现栈的基本操作push, pop, top 和 empt…
一直直到bug-free.不能错任何一点. 思路不清晰:刷两天. 做错了,刷一天. 直到bug-free.高亮,标红. 185,OA(YAMAXUN)--- (1) findFirstDuplicate string in a list of string. import java.util.HashSet; import java.util.Set; public class Solution { public static void main(String[] args) { String[…
Id Question Difficulty Frequency Data Structures Algorithms 1 Two Sum 2 5 array + set sort + two pointers 2 Add Two Numbers 3 4 linked list two pointers + math 3 Longest Substring Without Repeating Characters 3 2 string + hashtable two pointers 4 Med…
参考链接:https://docs.google.com/spreadsheet/pub?key=0Aqt--%20wSNYfuxdGxQWVFsOGdVVWxQRlNUVXZTdEpOeEE&output=html ID Question Diff Freq Data Structure Algorithms 1 Two Sum 2 5 array sort set Two Pointers 2 Add…