Caterpillar's life path
The first caterpillar
The first caterpillar finally came to the apple tree one day. He does not know that this is an apple tree, nor does he know that the tree is full of red apples. When he saw his Companions go up, he climbed up without knowing it. There is no purpose, no end, no end, or why you want to survive or die. What about his final outcome? You may have found a big apple an
Problem Description:Since seeing the price of Apple on Christmas Eve, Lele has planted a row of apple trees at his doorstep, with a total of n trees. Suddenly Lele found a caterpillar on the P tree (starting from 1) on the left. In order to see the caterpillar become a butterfly process, Lele at the apple tree to observe for a long time. Although no butterflies were seen, Lele found a pattern: every minute,
For the dynamic planning, I will not say more. Because not yet,Each question is different, but the general principle is the same. Catch test instructions,Subject: N tree, Caterpillar in M minutes from p to t route species, caterpillars can only go to the left and right adjacent positions.Center Code:For(I=1; I; I+ +) for (J = 1; j ; J+ +) DP[i][j] + = DP[i- 1][j-1] + DP[i-1][j+1];The number of species that traverse the locations of all possible point
The feeling is much simpler than the other trees, but it's a little bit around (maybe my train of thought is strange.) A) (this is the province of the topic Ah, even as T1 this problem is also too water, ha good weak ... )Original question:For a tree, we can pull a chain and the edge connected to the chain, it looks like a caterpillar, the more points, the bigger the caterpillar. For example, the tree on th
Question DescriptionFor a tree, we can pull a chain and the edge connected to the chain, it looks like a caterpillar, the more points, the bigger the caterpillar. For example, the tree on the left (Figure 1) pulls part of it into a caterpillar on the right (Figure 2).Input dataIn the text file worm.in, the first row of two integers N, M, respectively, represents
Test Instructions DescriptionIdeas[HAOI2009] CaterpillarTree-shaped DPThe largest caterpillar can be seen as the root of a single nodeTwo chains with the largest number of nodes and directly adjacent nodes in the subtreeThe number of points that are directly connected to I in the subtree of I using the Con[now] array(Con[now in the code] includes now itself)Assuming the root now=6, the yellow partUse Num[now] to indicate the maximum number of links an
The details of this problem are handled quite a lot, but AC is not difficult;The maximum length of the caterpillar is f[i], then F[i]=max (F[j]) +i The child number of the node, which can be formed by a subtree of the root node;The answer requires the merging of two sub-trees of F Max and ans++, and if the merging position is not the root node;I was the pit at the last point, and finally hit the table to find the problem;1#include 2#include 3#include
The Caterpillar teaches you to write a template engine of your own, read the Caterpillar and teach you to write a template engine of your own, # phpchina debut # Smarty has always been regarded as a superfluous thing, I think the excess talents of Smarty are superfluous .... don't say that. Today, I will teach you how to write a template engine so that you can write your own template engine, and "> # Phpchi
Portal
Tree-based DP basic question finding the diameter of the weighted tree with vertices
Then, the point weight is the point degree of each point (son [])...
So it can be simplified.
Maintain the maximum and secondary chains starting from the root according to the normal routine
Change + 1 to + son [x]-1 when saving the DP array.
So DP [x] = Maxx + Maxxx + son [x]-1
(Maxx and Maxxx maintain the longest and secondary chains)
While ans get Max
Time cost: 45 min
Code:
1 #includeView code
Luogu
# Phpchina debut #
Smarty has always been regarded as a superfluous thing. I think there is nothing more than Smarty. Today, I will teach you how to write a template engine so that you can write your own template engine. After reading this article,
#phpchina首发 #Smarty has been seen as superfluous, and I think it is superfluous to think that smarty is superfluous .... Don't say that. Today I teach you to write a template engine, so that everyone can write a template engine belonging to their
wants to know if there is a queueing scheme that can get change for everyone. If output "YES" is feasible, output "NO".Input formatThe first line is a number n, which means that there are n people who want to buy a meal.The next line of N is the number of AI, which represents the denomination of the money the person carries.Output formatOutput "YES" or "NO".NoteInput sample325 50 100Output sampleNOData rangeFor 100% of data nIdeasAll the people take the money from small to large order, you can
process. If a BIJ is modified, all bij in its column must be modified accordingly. An example is provided to clarify this point. For example, we modify the table before FD "H → I" and "K → L", as shown in table 1 (the table has been modified many times, not the initial table, empty unit is omitted ):
Table 1
H
I
J
K
L
R1
B12
B35
R2
A1
A2
A4
B25
R3
A1
B12
J. Worm
Time limit:1000 ms
Case time limit:1000 ms
Memory limit:32768kb
64-bit integer Io format:% I64dJava class name:Main
SubmitStatusPID:6295
Font Size:
After seeing the price increase of apple on Christmas Eve, Lele planted a row of apple trees at the door of his house, N in total. Suddenly Lele found a caterpillar on the P tree (counted from 1) from the left. Lele watched the apple tree for a long time to see the
table is all a, that is, A1,a2,..., An, then you can immediately conclude that P-phase for F is lossless connection decomposition, at this time no longer need to continue to modify. If the table does not have a row full of a, then the decomposition is lossy, after several modifications until the form cannot be modified. It is important to note that there is a process of looping over and over again, because one modification can cause the table to continue to be modified. In the process of modi
, weak, weak, or a winner.
59. Caterpillar Effect
The caterpillar is used to stick to its original instincts, habits, precedent and experience, instead of breaking the trailing habits and turning to the food system.
French psychologist John Farber once done a famous experiment called the "caterpillar experiment": put many caterpillars on the edge of a flowerpot,
. Judging R decomposition into Ρ={r1, R2, R3, R4, R5} non-destructive join decomposition? Solution: Such a problem to be solved by drawing a table, first, the original table:
A
B
C
D
E
AD
A1
B12
B13
A4
B15
Bc
B21
A2
A3
B24
B25
Be
B31
A2
B33
B34
A5
Cde
B41
B42
A3
HDU 2151 wormproblem description since seeing the price rise of apple on Christmas Eve, Lele has planted a row of apple trees at the door of his house, N in total.
Suddenly Lele found a caterpillar on the P tree (counted from 1) from the left. Lele watched the apple tree for a long time to see the caterpillar change into a butterfly. Although no butterfly is seen, Lele finds a rule: every minute, the
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