combinatorics

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partition of integers [closed]

Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow.[详细]

2023-01-20 09:15 分类：问答
Is this combinatorial optimization problem NP-hard?

I working on a combinatorial optimization problem that I suspect is NP-hard, and a genetic algorithm has been working well with our dataset.We\'re a research group and plan to publish our results in o[详细]

2023-01-20 02:05 分类：问答
Generating Unique Combinations from a list of possible repeated characters

I am looking to generate combinations from a list of elements. Right now i am using a approach of generating power set. For example to generate combinations from {a,b,c}, i will enumerate 001,010,100[详细]

2023-01-19 03:46 分类：问答
Arrangement of n objects (Permutation with duplicates)

I am looking for a fast implementation of the \"arrangement\" algorithm (permutation with duplicates).[详细]

2023-01-18 15:10 分类：问答
Maximum value of postage stamps on an envelope

The postage stamp problem is a mathematical riddle that asks what is the smallest postage value which cannot be placed on an envelope, if the letter can hold only a limited number of stamps, and these[详细]

2023-01-18 07:48 分类：问答
combination of combination java

I need to find combination of combination in JAVA. I have for instance 6 students in class. Out of them, I need to create combination of 4 people in group, and for each group I can choose an intimate[详细]

2023-01-17 21:43 分类：问答
List all k-tuples with entries summing to n, ignoring rotations

Is there an efficient algorithm for finding all sequences of k non-negative integers that sum to n, while avoiding rotations (completely, if possible)? The order matters, but rotations are redundant f[详细]

2023-01-16 23:56 分类：问答
Creating restricted permutations of a list of items by category

I am trying to create a number of restricted permutations of a list of items. Each item has a category, and I need to find combinations of items such that each combination does not have multiple items[详细]

2023-01-16 04:27 分类：问答
Generate all combinations in SQL

I need to generate all combinations of size @k in a given set of size @n. Can someone please review the following SQL and determine first if the following logic is returning the expected results, and[详细]

2023-01-15 09:42 分类：问答
Choosing subsets of a set such that the subsets satisfy a global constraint

We have a set of items I = {i_1, i_2, ..., i_n}.Each of these items has what we call a p value, which is some real number.We want to choose a subset of I, call it I\', of size m (for some m with 1 <[详细]

2023-01-13 11:24 分类：问答