Trapping Rain Water)

Question: Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. For example,Given [,], return 6.   The above elevation map is represented by array [,].

HDU2560: Buildings

Problem DescriptionWe divide the HZNU Campus into N * M grids. as you can see from the picture below, the green grids represent the buidings. given the size of the HZNU Campus, and the color of each grid, you shocould count how many green grids in

ZOJ 1883 Tight Words

Transfer equation: F (I, k) = F (I-1, k-1) + F (I-1, k) + F (I-1, k + 1) F (I, k) indicates the total number of solutions before position I, where the last one is k.   I am wondering that there is no problem with precision in writing this

Constant space traversal Binary Tree

We know that traversing a binary tree requires an O (n) stack space (system stack or stack controlled by programmers) for both sequential traversal, central traversal, and post-sequential traversal ), or a queue of the O (n) size is required for

About trigraph in C/C ++

Let's talk about trigraph in a simple way. In this case, no one can understand trigraph. trigraph is a three-letter word, which is also called a three-hyphen. Thrgraph came into being in order to take care of the older generation of "proletarian

Quantity not available

/* James opened a candy store. He was ingenious: He made water fructose into four one package and seven one package. Candy cannot be sold in a package.When a child comes to buy sugar, he uses these two packages for combination. Of course, the

10453-Make Palindrome

[Cpp]Description: converts a string to a text return by adding a string, and then outputs the text return.# Include # Include # Include Char str [1010];Int p [1010] [1010];Int v [1, 1010] [2, 1010];Int min (int x, int y){Return x> y? Y: x;}Int dp

Hdu 2544 (spfa)

Shortest PathTime Limit: 5000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission (s): 19890 Accepted Submission (s): 8504   Problem DescriptionIn each year's competition, all the finalists will get a very beautiful

Going in Cycle !! Ultraviolet

/* Find the loop with the smallest average weight. Here there is a conversion. W1 + W2 +... + Wk The average weight of the binary loop mid, converts the above formula to (W1-mid) + (W2-mid) +... + (Wk-mid) Spfa is used to determine whether a

Hdu 1339 A Simple Task Mathematical Problem

A Simple TaskTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Problem DescriptionGiven a positive integer n and the odd integer o and the nonnegative integer p such that n = o2 ^ p. Example For n = 24, o = 3 and p = 3.

How to read directory name using std c in the linux

[Cpp] # include # Include # Include # Include # Include  # Define err_quit printf# Define err_sys printf # Define TRUE 1# Define FALSE 0# Define EXIT_FAILE 0# Define EXIT_SUCESS 1# Define bool char Static char g_cur_dir [256] = "";Int read_directory

1. Understand implicit interfaces and polymorphism during compilation

Explicit interface, multi-state at runtime (Object-Oriented Programming solution)Explicit interface: We know what it looks like and it is clearly visible in the source code.Virtual function: provides support for Polymorphism during runtime and calls

Hdu4450-Draw Something

Not to mention   [Cpp]// File Name: hdu4450.cpp// Author: bo_jwolf// Created Time: Friday, January 1, May 24, 2013 14:33:25 # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include #

Hdu 1358 KMP

Returns a string with a length of n, the length of the loop prefix of the string, and the number of cycles; Example: ababababThe first 4 characters, the cyclic string is AB, and there are 2 cyclic AB | ABThe first 6 characters. The cyclic string is

Usage of virtual and pure virtual functions (C ++)

Usage of virtual and pure virtual functions in C ++ 1. virtual functions and pure virtual functions can be defined in the same class. Classes containing pure virtual functions are called abstract classes, and classes containing only virtual

Poj 1789 truck history

A very bullshit English question. I did not understand the meaning of this question, but it is the smallest spanning tree, and then the prim algorithm is used to solve it. The solution is confusing. [Cpp] #include # Include # Include Using namespace

BZOJ 3211)

Time Limit: 5 Sec Memory Limit: 128 MBSubmit: 52 Solved: 24[Submit] [Status] [Discuss]Description Input OutputEach time x = 1, each line has an integer, indicating the pleasure of the trip. Sample Input4 1 100 5 5 5 1 1 2 2 1 2 1 1 2 2 2 3 1 1

Hdu1085-Holding Bin-Laden Captive!

[Cpp]# Include # Include # Include  Using namespace std;Int num [10];Int c1 [100000], c2 [100000]; Int main (){Int I, j, k;While (cin> num [1]> num [2]> num [5]){If (num [1] = 0 & num [2] = 0 & num [5] = 0)Break;Int MAX = num [1] + num [2] * 2 + num

POJ1753 (Gaussian elimination element modeling)

  [Cpp] # include # Include # Include  Using namespace std;Const int n= 105; Int equ, var;Int a [N] [N];Int B [N] [N];Int x [N];Bool free_x [N];Int free_num;Int ans = 100000000; Int absx (int x){Return x } Void Debug (){Int I, j;For (I = 0; I {For

[LeetCode] Search in Rotated Sorted Array II

[Cpp]Class Solution {// Classified discussion// 1. Based on the property of rotated array, there may or may not have one sorted sequence// When one sequence is divided into two parts// 2. make demo-under all these casesPublic:Bool search (int A [],

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