Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enumeration of Standard Puzzles   We introduce a large family of combinatorial objects, called standard
puzzles, defined by very simple rules. We focus on the standard puzzles for
which the enumeration problems can be solved by explicit formulas or by
classical numbers, such as binomial coefficients, Fibonacci numbers, tangent
numbers, Catalan numbers, $\ldots$

12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
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The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs