interval stopwatch

"056-merge intervals (interval merger)""leetcode-Interview algorithm classic-java Implementation" "All Topics folder Index"Original QuestionGiven a collection of intervals, merge all overlapping intervals.For example,Given [1,3],[2,6],[8,10],[15,18] ,Return [1,6],[8,10],[15,18] .Main TopicGiven a set of intervals, the overlapping intervals are merged.Thinking of solving problemsThe interval is sorted first.

Re"Problem Introduction"For the simple problem of interval modification and interval query, it is really not worth hitting a bunch of line-segment trees today to introduce a tree array of interval query + interval modification"Some Basics"The basic knowledge of the tree array is no longer introduced, please own BaiduWe

Copyright NOTICE: This article is the main original article, reproduced must be annotated address: Http://blog.csdn.net/liuxucoder The question of the interval point of choosing can be roughly described as:given n intervals [a,b], take as few points as possible, so that there is at least one point in each interval (the points contained in different intervals can be duplicated). About the greedy algorithm ve

Can persist segment treeA durable segment tree is a magical data structure that differs from our usual line-of-segment tree, where each update does not change the original data, but rather opens a new node, maintaining its historical version and achieving "persistence". (Of course, depending on the situation will also need to modify the time)There are many applications for the persistence of segment trees, and this data structure is introduced only in the simple question of the

Prior to the 9i version, Oracle had no built-in way to record the passage of time. Date data is used to record individual points of time, but to express a time amount (that is, an interval), the designer of the database must convert the time interval to the original unit seconds and then save it with a number column.Although number is a data type that can accurately represent time in seconds, it makes the c

Title Link: http://poj.org/problem?id=2528Give you n pieces of wood, and each plank has its starting and ending points, placed in order and asked to see a few pieces of wood at the end.It is obvious that the line tree interval update problem, each time the board is placed to update the values in the interval. Because the range of L and R is large, memory is not enough, so using discretization techniques suc

Given a source interval [x, y] (y>=x) and n unordered target range [x1,y1] [x2,y2] [x3,y3] [Xn,yn], determine if the source range [x, Y] is within the target range?For example: Given the source interval [1,6] and a set of unordered target intervals [2,3] [[3,9]], the interval [1,6] is considered to be within the interval