replay backpack

This problem in fact and the general 01 backpack no difference, but the problem in accordance with normal thinking to do, because the capacity is too large, open an array of 10^9 can not open, so this time need to change the thinking, the problem just started not understand, and later on the internet in the solve, found that is the exchange of weight and value, But has not understood what the meaning, later, carefully thought about that the most basic

value of the optimal solution in a "bottom-up" manner.5. Build the path to the optimal solution from the calculated information. (The optimal solution is a set of solutions where the problem reaches the optimal value)The step 1~4 is the basis of the dynamic programming solution problem, if the topic only requires the value of the optimal solution, then step 5 can be omitted.Knapsack problem01 Backpack: There are n items and a

Compared with the reprinted article, I prefer to write a note, the beginning of the original link. In this way, to have some of their own things, summed up, the understanding of knowledge can deepen a layer, others see, also more valuable.Today do Usaco topic, a problem will not, online to find the solution is 01 backpack, so re-read the "Backpack Nine talk." Compared to the first time to see, understand th

Http://www.concretevitamin.com.cn/informatics/Pack/P02.html Question There are n items and a backpack with a capacity of V, each of which has unlimited items available. The cost of the I-th item is C [I], and the value is W [I]. Solving which items are loaded into a backpack can make the total cost of these items not exceed the capacity of the backpack, and th

XiaoA wants to spend as much time as possible to do ACM, but the boss asks him to finish n heap jobs within t time, and each job consumes cost [I] [j], happiness val [I] [j]. Each job has num [I] jobs, and each heap of jobs has a nature. 0 indicates that at least one job should be done, 1 indicates that one job can be done at most, and 2 indicates that the job can be done or not done at will. Finally, I asked my boss how to achieve the highest happiness when meeting the boss's requirements.-1. S

01 A complete backpack problem. This mainly describes the number of combinations. There are more people doing two-dimensional DP. here we can use one-dimensional DP. One-dimensional transformation equation: DP [J] = DP [J-I] + dp [J]; where I represents the weight and J represents the current backpack capacity. This means that DP [J-I] indicates the maximum combination of J-I

Description: How can Roy grab the most money without being caught. It provides the money that each bank can grab and the probability of being caught. Analysis: at the beginning, we thought that the probability was only two decimal places, multiplied by 100, and we found that the data was not like this. We decided to wa. Then I am stuck here. What should I do if the size of my backpack is not an integer. In desperation, I looked at other people's probl

Http://www.cnblogs.com/fly1988happy/archive/2011/12/13/2285377.html: 1. The optimal solution for "just full of backpacks" is required: During initialization, Except f [0] is 0, F [1 .. v] is set to-∞, which ensures that the final f [N] is an optimal solution just filled with a backpack. If the capacity of the backpack cannot be satisfied, that is, the optimal value of F [v] cannot be obtained. Then,

Poj 2063 investment (full backpack) Http://poj.org/problem? Id = 2063 Question: Initially, M (M Now you need to buy a t-year (T Analysis: Since there are n stocks and each stock can be bought without limit, this question can regard every year's investment as a complete backpack problem. then, we will continue to invest in the next year with the profit and capital of the previous year (it is also a complet

Hdu 2602 01 backpack Background: if you have not carefully read the question, the wrong input order is skipped once. I made the first DP question myself. After reading this question for a long time, I finally understood the 01 backpack mentioned in Chapter 9. Learning: 1.01 A backpack features a limited number of items. You can choose to put or not to put each it

The last two days have been plagued by a tree-shaped knapsack problem. The cause of all this was a knapsack problem, a problem that was done on Hackerrank a year ago.The main topic is:$ to a tree of N nodes, node I for a value of v[i], volume of s[i] goods. Another backpack with a volume m, requires a connecting block on the tree to be loaded into the backpack, \ \ Makes the total value of the selected item

The 01 knapsack problem which the greedy method cannot solve is an inseparable problem01 knapsack problem is to consider the overall optimal solutionThe premise of greedy strategy is that local optimal strategy can lead to global optimal solution.Analysis and editing of examplesExample 1,[0-1 knapsack problem] There is a backpack, the backpack capacity is m=150. There are 7 items, items can not be divided i

knapsack problem I difficulty level: B; run time limit: 1000ms; run space limit: 51200KB; code length limit: 2000000B Questions Description has a backpack volume of v and n items, and gives each item a volume. Request from n items, any number of packs into the backpack, so that the remaining space of the backpack