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Results tagged with combinatorics
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user 1183778
For questions about the study of finite or countable discrete structures, especially how to count or enumerate elements in a set (perhaps of all possibilities) or any subset. It includes questions on permutations, combinations, bijective proofs, and generating functions.
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How to solve a given combinatorial problem?
Given $n$ balls, which are numbered from $1$ to $n$, and also $n$ boxes, which are also numbered from $1$ to $n$. Initially, $i$-th ball is placed at $i$-th box. Then we are doing the following proces …
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