HDU-1262 prime number Pairs

Question 1: Print the prime number table first, then go to the middle, and select one from both sides. The idea is that the sum of the two identical elements is equal to the even number, for example, 34 = 17 + 17. I did not pay attention to this wa.

HDU-1431 Prime Number

When we see the prime number, we think of the prime number as a table. However, the data for this question is too big. I'm afraid it will time out before I enter it. I don't know what to do. It seems that discussion knows the maximum Prime Number of

HDU-2795 billboard (line tree) RE lessons!

Question connection After two days of building a line segment tree, I have been making a mistake,CodeIt seems correct. submission is always re !, I am confused and have made several consecutive questions. I am completely speechless. I am not in

HDU-4633 poyla count

Question connection For details, see this: Click to open the link. Explanation: There is a polyA theorem:M = 1/g * Σ m ^ C (ð I)G is the number of replacement groups. M indicates the number of dyes. C (replacement I) indicates the number of

HDU-4651 integer decomposition (generation function)

Question connection Calculate the number of P (n) by dividing the number n. I heard that many people are reading this: Click to open the link. I will not talk about it anymore: # Include # define mod 1000000007 _ int64 f [100005]; int W [10000

Poj1050-maximum submatrix and

Question connection Question: Give a matrix of N * n, and find the largest sum of its sub-matrix. Analysis: This is an extension of the largest subsequence sum. The key is how to use a single subsequence to obtain a matrix. I have never thought

Zoj-1005 pouring Problem

Question connection This question seems difficult at the beginning, a bit like DP, and a bit like BFs. Dizzy !, I did not expect to use the simulation method. This question is really weird and I am speechless.CodeIt was so simple that I was

Interval Update and summation of poj-3468 line tree and tree Array

Question connection This is also the first self-completed Question for getting started with the line tree. Because in the past, I have read the method of updating the interval of a line segment tree written by someone else. It is called the

HDU-1261 combined mathematics.

The formula for this question is very good. First, sort all data in the M number. Because of the same number, we need to remove each factorial with the same number. So there is a formula: A = (A + B + C + D + ........)! /(! * B! * C! * D !.........

HDU-4477 rolling array + recursion (integer decomposition)

Question connection Question: Given the length of the rope, you can only cut the rope into any length that is shaping and different from each other. For example, 4 = 1 + 3. 5 = 1 + 4. 5 = 2 + 3. 6 = 1 + 2 + 3. 6 = 1 + 5. 6 = 4 + 2. Analysis:

Poj2250-print a single LCS path.

Question connection It is the longest common subsequence. And print the path. Analysis: The Longest Common subsequence is not difficult. Note that it is printed as a path. We know that the two-dimensional array DP is used to save its matching number.

Poj1934-print all LCS paths + search

Question connection Question: Print all LCS paths and output them alphabetically. This question is more difficult. Refer to shengren code Some improvements are as follows: #include #include #include #include #include using namespace std;const int N=

6) poj1251-Kruskal Algorithm

The head elder of the tropical island of lagrishan has a problem. A burst of foreign aid money was spent on extra roadsAges some years ago. but the jungle overtakes roads relentlessly, so the large road network is too expensive to maintain. the

Poj1861 minimal spanning tree (query set)-Kruskal Algorithm

The Kruskal algorithm is a method for constructing the Minimum Spanning Tree in the order of increasing weights of edge nodes in the network. The basic idea is to set the undirected connected network to G (V, E), so that the Minimum Spanning Tree of

12 effective methods to improve programming skills

1. Never stop learning and readingReadBooks, not just websitesReadOnly for self-improvement, not for the next projectReadImprove your infrastructure, not just the latest technology 2. Work with people smarter than youWorking with people smarter than

HDU-1041 big number operation + Recursion

Question connection The memory of the computer is first initialized to 1. After a period of time, it is changed to 0 and 1. Then 0 is changed to 10, and 1 is changed to 01. It means that (1-> 0 1) (0-> 1 0) The question goes through n steps. The

Poj1151-line segment tree and discretization, scanning line

Question connection Many people on the Internet say that this question is classic and worth doing it. However, it seems difficult for acmer who just learned the line tree. I did not leave it out, and I searched many people for the final report, not

HDU-1754 line segment tree

Entry to a typical line segment tree: Query: maximum interval, update: Single Point update; # Include # define M 220000 struct node {int L, R; int val;} tree [M * 4]; inline int max (int A, int B) {// Add built-in functions to improve the running

Stoer Algorithm for minimum cut of poj-2914

This is a template question. You can use the stoer algorithm. There are many similar explanations about this algorithm on the Internet, so you don't have to post it again (you don't know who is the original) Paste a template (submit for more than 800

Geometric question-find the maximum volume of a cylindrical

Click Open Link I always think that the problem is too complicated and I think it is a three-point search. This question is not necessary at all. As long as the circumference is equal to the side, the biggest circle in the rectangle is to take the

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