triplehead2go dp

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POJ 3254 Corn fields (pressure DP, contour line DP)

Test instructionsThere is a n*m matrix (0Ideas:Obvious pressure DP, just how to compress the state? Like Contour DP, the state is designed in grid units, a state only needs to be represented above and to the left of the lattice, so it is only necessary to save min (n,m) 01 states (can try to rotate the matrix), up to 12 bits. Using a hash table to do it will be faster, do not have to consider the invalid st

[Poj3208] What is the most difficult digit DP for poj? (The positive solution is the AC automatic machine and the two-digit DP. I am surprised)

Question: For multiple groups of data, each group calculates the N number containing '123' (cannot be disconnected), for example, 1: 666, 2: 1666,14: 666. Question: I didn't think about the AC automatic solution, but I didn't know the digital DP. Here there is a digital tree similar to the digital DP, but it is different from the digital DP. Digital tree: Splits

[DP problem] girl love value (DP problem) hdu2670

Problem descriptionLove in college is a happy thing but always have so far pity boys or girls can not find it. now a chance is coming for lots of single boys. the most beautiful and lovely and intelligent girl in HDU, named Kiki want to choose K single boys to travel Jolmo Lungma. you may ask one girls and K boys is not a interesting thing to k boys. but you may not know Kiki have a lot of friends which all are beauti Ful girl !!!!. Now you must be sure how wonderful things it is if you are choo

bzoj4565 [Haoi2016] word conforming and (interval DP + pressure DP)

bzoj4565 [Haoi2016] word matches and Original title address : http://www.lydsy.com/JudgeOnline/problem.php?id=4565 Test Instructions:There is a 01 string of length n, you can match the adjacent K characters each time and get a new character and get a certain score. The new characters and fractions obtained are determined by this K-character.You need to ask for the maximum score you can get. Data Range1 The following:The Dalao of the N is very small, it is easy to think of n^3 interval

Hdu4960another OCD patient (interval DP, block before DP)

of each case is an integer N (0 (0 , And A1 is always 0. The input is terminated by n = 0. Outputoutput one line containing the minimum cost of all operations Xiaoji needs. Sample Input 56 2 8 7 10 5 2 10 200 Sample output 10HintIn the sample, there is two ways to achieve Xiaoji‘s goal.[6 2 8 7 1] -> [8 8 7 1] -> [8 8 8] will cost 5 + 5 = 10.[6 2 8 7 1] -> [24] will cost 20. Authorsysu Source2014 multi-university training contest 9: returns the number of N, which is a symmetric set. The third

Hdu4570Multi-bit Trie (interval DP), interval dp

Hdu4570Multi-bit Trie (interval DP), interval dpProblem Description IP lookup is one of the key functions of routers for packets forwarding and classifying. generally, IP lookup can be simplified as a Longest Prefix Matching (LPM) problem. that's to find the longest prefix in the Forwarding Information Base (FIB) that matches the input packet's destination address, and then output the corresponding Next Hop information. Trie-based solution is the mos

NOIP 2008 Notes NOIP 2000 blocks take multiple threads DP

The idea is the same, set up a four-dimensional DP and then run.Of course, can also be like me so handsome person, down into three-dimensional again silly run a la La ~#include #include#include#includestring.h>#includeusing namespacestd;#defineMAXN 205intDP[MAXN][MAXN][MAXN];intMAP[MAXN][MAXN];intMain () {memset (DP,0,sizeof(DP)); memset (Map,0,sizeof(map)); intn

CF 909C Python Indentation (DP)

command. The command is either "F" (denoting ' for statement ') or "s" ("simple Statement"). It is guaranteed , the last line was a simple statement.OutputOutput one line containing a integer-the number of ways the given sequence of statements can be indented modulo 10 C7>9 + 7. Examplesinputcopy4SFFSOutput1Inputcopy4FSFSOutput2NoteIn the first test case, there was only one-to-indent the program:the second for statement must was part of the body of The first one.Simple statementFor statement

Bzoj 1029 [JSOI2007] construction Repair--greedy (pseudo DP)

Title: https://www.lydsy.com/JudgeOnline/problem.php?id=1029Of course, sort by end time, then fix or skip in order. It's the kind of "... The proof that the answer will not be "."Think of a DP. dp[i] [j] represents the first building, a J-building, the earliest time to complete. It's a pity that n^2.dp[I [J]=min (Dp[i-

Poj2955brackets interval DP (bracket matching)

First consider how to define the DP so that it satisfies having a sub-structure to solve, define DP [i] [j] as the number I to the J bracket in the string maximum match Then if we know the maximum match of the I to J interval, then the i+1 to the j+1 interval is not Can be very simple to get. So if the first and the first J are a pair of matching parentheses then DP

HDU 4487 probability DP

It is simple to ask for the problem of state transfer equation; Dp[i][j][k] means walk I step to J position the rightmost position is k so it's easy to know k>=j; S: probability l go left probability R go right if k==j; Dp[i][j][k]=dp[i-1][j][k]*s+dp[i-1][j-1][k-1]*r+dp[i-1]

[HDU 4336] Card Collection [State compression DP] [probability DP] [refresh principle]

Question: There are N types of cards in snacks. The probability of each card I is pi. A bag of snacks may not have a card, but there is a maximum of one card. Ideas: 1. dp, dp [s] indicates that the expected number of bags is collected in the s state. S = 11111 indicates the status of the set when N = 5. In this case, dp [s] = 0; Pay attention to the expected que

[HDU 4336] card collection [State compression DP] [probability DP] [refresh principle]

Question: There are N types of cards in snacks. The probability of each card I is pi. A bag of snacks may not have a card, but there is a maximum of one card. Ideas: 1. DP, DP [s] indicates that the expected number of bags is collected in the S state. S = 11111 indicates the status of the set when n = 5. In this case, DP [s] = 0; Pay attention to the expected que

[DP set DP] uoj#141. "Uer #4" The quantum state of the chessboard __ math-related

position is exactly the same, he only changed the number on the original board. But because the results were eaten by handyman jiry_2, he now remembers only the number of small balls in the interval [Li,ri] that were received in the first experiment.Now, Dr. Picks tells you the size of the chessboard, the number of balls, the position of the basket, and the Li and Ri for each experiment, and he wants to ask you to figure out how many possible chessboard of each test will satisfy the condition.n

POJ 2441 Arrange The Bulls (state compression dp+ scrolling array)

Test instructionsn Cattle and M-barn, each cow has its own favorite P-Barn (1Analysis:DP[I][J] Represents the number of methods of the I cow in J state.DP[I][J] = Sigma (Dp[i-1][k]) (k from 0 to 1To be optimized with a scrolling array, otherwise dp[20][1Note the emptying of the scrolling array = =!1#include 2#include 3#include 4#include 5#include 6#include 7#include 8#include 9#include Ten#include Set> One

HDU 4085 Peach Blossom Spring eectilinear State compression DP+SPFA

State compression DP+SPFA Chestan NashuEnumeration subtree morphology dp[i][j] = min (Dp[i][j], dp[i][k]+dp[i][l]) where K and L are a division of Jrelax by the edge dp[i][j] = min (dp[

Codeforces 919D Substring (topological sort + tree DP)

Title: SubstringTest instructions: give you a map, there are n nodes, M-bar change, the value of a road on this road has been a character up to the number of occurrences, now seek this maximum value, if the value can be infinitely large output-1.Puzzle: When this directed graph constitutes a ring, it will make the value infinitely large, so first use topological sort to determine if there is no ring, if there is a direct output 1, if there is no ring then use the tree

Codeforces 834 D. The bakery (segment tree +DP) __ Dynamic programming

≤min (n, 50)) –the number of cakes and the number of B Oxes, respectively. The second line contains n integers a1, a2, ..., an (1≤ai≤n) –the the types of cakes to the order the oven bakes. Output Print the only integer–the maximum total value is boxes with cakes. examples Input 4 1 1 2 2 1 examples Output 2 the There are n n numbers divided into k K K, each segment of the value of which is the number of different numbers, to find the total maximum value. train of Thought It is easy to think

Digital DP hdu3555 Bomb

Bomb Title: http://acm.hdu.edu.cn/showproblem.php?pid=3555 Q: Give you a number n (1 Solving: Digital DP. It's actually a DP with a number of units, something like a dictionary tree in an AC automaton. We can divide the situation into 3 kinds according to the dictionary tree, "49" in the sequence, no "49" in the sequence, but the last one is "4", there is no "49" in the sequence and the last one is not "4"

HDU-6065 RXD, tree and sequence (DP+LCA)

. Adding a number to the section of paragraph p, the value of the interval is not increased. This can also be obtained by the nature of 1. Define DP[I][J] The minimum value to be spent on the first I-bit cut into the J-segment, the recursive equation can be derived from the above properties: ① adds AI to section k intervals without changing its value: Dp[i][j]=dp

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