best trapping book

E: # small SunPrint ("Error:%s"% e)Print ("Hello, World")Fourth usage: try...except...finallyTryPrint (a)Except Indexerror as E: # small SunPrint ("Error:%s"% e)Finally: #无论是否能捕捉到错误, the program after finally runsPrint ("Hello, World")# Uses: Generally we use in file or database resources processingTryFile = open (' Test.txt ', ' W ')File.read ()Except Exception as E:Print ("Error:%s"% e)FinallyFile.close ()Fifth usage: Try...except...elseTryA = 4BExcept Exception as E:Print ("Error:%s"% e)Else

Tags: SQL stored procedure rookie multi-column First color association delete duplicate Data Book userIn the MySQL tutorial | The Novice Tutorial system Review Some of the knowledge points have not mastered or the way of thinking has not fully followed the place, wrote a note, reasoning this note for any reader other than me has no practical value, Only for my review of the MySQL foundation process in the leakage of the vacancy.MySQL query:MySQL does

Title Link: Trapping Rain waterGiven n non-negative integers representing an elevation map where the width of each bar are 1, compute how much water it is able to trap after raining.For example,Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6. ^ 3| ■ □: water 2| ■ □ □ □ ■ ■ □ ■ ■: elevation map 1| ■ □ ■ ■ □ ■ ■ ■ ■ ■ ■ The requirement of this problem is to calculate how much water can be loaded. Where the number in the arra

Given m x n a matrix of positive integers representing the height of each unit cell in a 2D elevation map, compute the VO Lume of water it is able to trap after raining.Note:Both m and N is less than 110. The height of each unit cell is greater than 0 and was less than 20,000.Example:Given the following 3x6 height map:[ [1,4,3,1,3,2], [3,2,1,3,2,4], [2,3,3,2,3,1]]return 4.The above image represents the elevation map [[1,4,3,1,3,2],[3,2,1,3,2,4],[2,3,3,2,3,1]] before the rain.After the rain, w

"Title description"Given n x m non-negative integers representing an elevation map 2d where the area of each cell is 11, compute how much water it's able to trap after raining.Given n x m nonnegative integers, which represent two-dimensional elevation maps, the area of each unit is 1 x 1, calculating how much water can be caught after the rain."Topic link"www.lintcode.com/en/problem/trapping-rain-water-ii/"Problem Analysis"First we should be able to a

#-*-Coding:utf8-*-‘‘‘__author__ = ' [email protected] '42:trapping Rain Waterhttps://oj.leetcode.com/problems/trapping-rain-water/Given n non-negative integers representing an elevation map where the width of each bar is 1,Compute how much water it was able to trap after raining.For example,Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6.===comments by dabay===Please refer to: http://blog.csdn.net/wzy_1988/articl

When writing code, the most afraid of code to write hundreds of thousands of lines, but a running program crashes, in order to improve the robustness of the Code, the following provides a way to improve the robustness of the code:　　Exception trapping mechanism1 // exception capture mechanism: Improve code robustness 2 @try---@catch---@finally The following is a small demo of a printed array to illustrate its usage1Nsarray *arr = @[@Ten, @ -, @ -];2

Describe Given n non-negative integers representing an elevation map where the width of each bar is 1, computehow much wat Er it is able-trap after raining. For example, Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6. Analysis: For each pillar, find the tallest pillar on the left and right side, the area that the pillar can hold is min (max_left,max_right)-height. So1. Scan from left to right, and for each pillar, the left maximum value is obtained;2. Scan from

Trapping Rain WaterGiven n non-negative integers representing an elevation map where the width of each bar are 1, compute how much water it is able to trap after raining.For example,Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6.The above elevation map is represented by array [0,1,0,2,1,0,1,3,2,1,2,1]. In this case, 6 units of the Rain Water (blue section) is being trapped. Thanks Marcos for contributing this image!Idea: This question is easy to see, but t

Given m x n a matrix of positive integers representing the height of each unit cell in a 2D elevation map, compute the VO Lume of water it is able to trap after raining.Note:Both m and N is less than 110. The height of each unit cell is greater than 0 and was less than 20,000.Example:Given the following 3x6 height map:[ [1,4,3,1,3,2], [3,2,1,3,2,4], [2,3,3,2,3,1]]return 4.The above image represents the elevation map [[1,4,3,1,3,2],[3,2,1,3,2,4],[2,3,3,2,3,1]] before the rain.After the rain, w

Https://leetcode.com/problems/trapping-rain-water/#/solutionsHere's my idea:instead of calculating area by Height*width, we can think it in a cumulative. In the other words, the sum water amount of each bin (width=1).Search from left to right and maintain a max height of left and right separately, which was like a one-side wall of partial Container. Fix the higher one and flow water from the lower part. For example, if current height of lower, we fill

https://leetcode.com/articles/trapping-rain-water/Finish a hard difficulty of the topic, the individual is very excited, suddenly that feel "double pointer" is simply an artifact, the title requirements of the entire container can be filled with the amount of water, intuitively, only the groove part can be filled with water, violent search method is too high complexity, the best way is to use a double pointer, left and right to place one, Notice how m

Given n non-negative integers representing an elevation map where the width of each bar are 1, compute how much WA ter It is the able to trap after raining.For example,Given [0,1,0,2,1,0,1,3,2,1,2,1] , return 6 .The above elevation map is represented by array [0,1,0,2,1,0,1,3,2,1,2,1]. In this case, 6 units of the Rain Water (blue section) is being trapped. Thanks Marcos for contributing this image!Analysis:We scan the whole array twice. First:from head to end; Second:from end to start.In every

Title Link: trapping-rain-waterImport java.util.stack;/** * Given n non-negative integers representing an elevation map where the width of each bar is 1, Compute how much water it was able to trap after raining. For example, Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6.The above elevation map are represented by array [0,1,0,2,1,0,1,3,2, 1,2,1]. 6 units of rain Water (blue section) is being trapped. Thanks Marcos for contributing this image! * */public cl

Feeling andContainer with most waterVery much like, here is a question, if let the ball biggest pit, how to do?and candy the problem, it seems that the double sweep seriesRef http://fisherlei.blogspot.com/2013/01/leetcode-trapping-rain-water.html Double Sweep Public classSolution { Public intTrapint[] A) {if(a==NULL|| A.LENGTHreturn0; intres=0, curv = 0, max=a[0]; int[] ML =New int[A.length]; int[] MR =New int[A.length]; for(intI=1; i) {Ml[i]=Max; Ma

https://oj.leetcode.com/problems/trapping-rain-water/This problem uses the monotone queue to be able to solve the O (n) time. Maintains a sort of monotone queue in descending order. If Ai>a[que.front] means that you can use Que.front as the top to calculate the water once.When starting from 0-n, be aware that there are elements in the queue. A monotone queue needs to be executed in reverse. But just go to the front location of the previous queue.class

Trapping Rain WaterGiven n non-negative integers representing an elevation map where the width of each bar are 1, compute how much water it is able to trap after raining.For example,Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6.The above elevation map is represented by array [0,1,0,2,1,0,1,3,2,1,2,1]. In this case, 6 units of the Rain Water (blue section) is being trapped. Thanks Marcos for contributing this image!Idea: This question is simple to see, but

Source of the topic:https://leetcode.com/problems/trapping-rain-water/ Test Instructions Analysis:Enter a set of arrays representing a height map with a width of 1. Q, how much water can this map collect after the rain? For example, enter an array [0,1,0,2,1,0,1,3,2,1,2,1] and return 6.: Topic Ideas:Although this topic is hard difficulty, but it is not very difficult. It is not difficult to find that the water is from the highest number an

Topic:Given n * m non-negative integers representing an elevation map 2d where the area of each cell was 1 * 1, compute how much Water it is able to trap after raining.Ideas:This problem is an extension of the previous question, http://www.cnblogs.com/AndyJee/p/4821590.htmlThe previous given is a one-dimensional array, and here is a two-dimensional array, the image of understanding, is to provide a three-dimensional cylindrical container, to find the maximum size of the container can accommodate

Trapping Rain WaterGiven n non-negative integers representing an elevation map where the width of each bar are 1, compute how much WA ter It is the able to trap after raining.For example,Given [0,1,0,2,1,0,1,3,2,1,2,1] , return 6 .The above elevation map is represented by array [0,1,0,2,1,0,1,3,2,1,2,1].In this case, 6 units of the Rain Water (blue section) is being trapped. Thanks Marcos for contributing this image!Idea: Find the maximum value and it