[STOI2014] partner (dp), stoi2014 partner dp
STOI is Shantou OI... I was bored with turning to the question of last year's competition. I wrote it and tested it myself. In fact, I really want to tell you why the subject name is perm. perm seems to have nothing to do with the partner ..
Dp (x, s) = Σ dp (x-1, s-{I}) (0
Meaning
The title is very simple, that is, the beginning of the x sheep and y Wolf, then they want to cross the river, the rule is: the ship has a capacity can only be loaded n animals, each river has at least one animal on board, and whether on the shore or on the ship must ensure that the number of wolves is less than the number of sheep. Now ask you the minimum number of operations that allow all animals to cross the river.
Exercises
This problem with DP
Test instructions: N number, divided into M-segment, to find the maximum of the M segment and, between the segments can not cross.Analysis:The difference between this problem and the maximal subsequence is that the requirements are divided into M-segments, so the approach is different. The actual practice is somewhat like a packet DP (the number of n is divided into M-groups), but the topic and the last written two group
Description a regular game before the start of the ticket work is underway. Each ticket is 50 yuan, the existing K (1 21 21 1Sample Output01HINT The main idea: DP is to see the relationship between the two states do not look at the whole, so dp[i][j] = Dp[i-1][j] is certainly satisfied, if the number of n is greater than or equal to M, the current can find the op
to be a, match string B, Dp[i][j] on behalf of B[1..I] and A[1..J] match successfully.
Apparently dp[0][0] = true,
for other situations:
If b[i] = = '. ', then a[j] can be any character, Dp[i][j] transferred from Dp[i-1][j-1.
If a[j] = = B[i], the same dp[i][j] is transferr
, which represents the balance on the card. mN=0 indicates the end of the data.Output for each set of inputs, outputs a line that contains an integer that represents the smallest possible balance on the card.Sample Input
1 50 5 10 1 2 3 2 1 1 2 3 2 1 50 0
Sample Output
-45 32
In fact, the two-dimensional DP equation should be Dp[i][j]=max (Dp[i-1][j],
Some DP and DP miscellaneous questions
1.
[HNOI2001] Product Processing
A simple backpack, but I still wrote QAQ for a long time.
The time range is smaller than 5. Obviously, one-dimensional backpacks are considered. dp [I] indicates that currently A consumes the minimum B consumption of I.
Note:
If (B [I]) dp [j] =
The question is that at least one string can be divided into several paragraphs, so that each paragraph is a palindrome string.At first, the direct interval dp,dp[i][j] represents the answer of the substring [i,j], but the length of the string 1000,100w state, a state is transferred from multiple states, and when it is transferred, it is enumerated so that time complexity is not feasible.And then I thought
Poj2342 -- hdu1520 -- Anniversary party (tree DP Exercise 1), tree dp
Anniversary party
Time Limit:1000 MS
Memory Limit:32768KB
64bit IO Format:% I64d % I64uSubmit Status
DescriptionThere is going to be a party to celebrate the 80-th Anniversary of the Ural State University. the University has a hierarchical structure of employees. it means that the supervisor relation forms a tree rooted at the rector V.
Question 2: Return Character Sequence (interval DP), return dpTime Limit: 256 ms single point time limit: Ms memory limit: MB
Description
Returns the number of subsequences of input strings. The reversed Character Sequence is still the same as the original sequence. For example, in the string aba, the input sub-sequence is "a", "a", "aa", "B", and "aba". There are 5 sub-sequences in total. Subsequences with the same content and different location
Dynamic Planning Learning Series-divide DP (2) and Plan dp
The second question of Partitioned DP, wikioi 1039, is different from the biggest idea of the product of the first question.
Question requirements: Divide a number into several parts and ask the total number of methods.Truth-solving ideas:In fact, it is a bit like some of the questions of Primary School
[DP] DP, hdu5115 in the Wolf interval of HDU 5115 Dire
Click Open Link
Question: The attacking power of a wolf = the attacking power of the wolf + the bonus of the neighboring wolf on both sides
Each time a wolf is killed, it will receive an attack.
Minimum and minimum attacks
Relatively bare interval DP
#include
Hdu 4276 The Ghost Blows Light (DP-tree DP)The Ghost Blows LightTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission (s): 2240 Accepted Submission (s): 688Problem DescriptionMy name is Hu Bayi, robing an existing ent tomb in Tibet. the tomb consists of N rooms (numbered from 1 to N) which are connected by some roads (pass each road shocould cost some time ). there
In Android, the unit conversion between dip (dp) and px is dip2px dp to px without context algorithm (and to obtain the screen width and height), and androiddip2px
Let's talk a little bit about the Code:
1. dip2px dp to px without context Algorithm
public static int px2dip(int pxValue){final float scale = Resources.getSystem().getDisplayMetrics().density;retur
+1), ..., a[y]-2,a[y]-1
i.e. [x, K] all a[] continuous, (k, Y] all of the a[] continuous amplitude optimal
Dp[i] indicates that the number of previous I is modified to the minimum amplitude of a strictly ascending sequence, where the number of I a[i] is unchanged
Then there are dp[i] = min (Dp[j]+mincost (k), J
Where mincost can also be directly violent k∈ (x, y)
The concept of balanced number is given first: number n is the pivot of a certain digit in number n, the weighted value of each bit is (Digital xi * (posi-FULCRUM posi )), if there is a fulcrum in number n that makes the sum of all the weights 0, then she is the number of balances. For example, 4139, with 3 as the pivot, 4 * (4-2) + 1 * (3-2) = 9, 9 * (1-2) on the Right) =-9. The value on the left and right are 0. Therefore, 4139 is the number of balances. Now we provide an interval [l, r]. How
Before: In fact, my DP is so weak to learn the slope optimization is not good because my DP a little bit difficult to push out the state transfer equation >0However, I did not hesitate to learn the slope optimization (in fact, you just do the problem when used to the way to see a bit of the soul light!)No, we cut the text.—————————-line Cut is me >ωWhen we do DP
Practice: in fact, there is a root tree in the question. At first, I thought there may be multiple connected components.
The data volume is so big, and I read the blog of the great god, and slowly hurt me...
If the current node is a leaf node,
Then DP [x] = 1-E [x]-K [x] + k [x] * DP [1] + sigma (P [I] * DP [fahter [I] );
If not
HDU2089 (Digital DP), hdu2089 digital dp
Question: for the interval [a, B], calculate how many of them do not contain '4' and do not contain '62', 1
Digital DP Solution. dp [I] [j] indicates the number of I-bits starting with j.
For example, dp [2] [6] represents 60, 61, 66
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