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- #ifndef FUNCTION_H
- #define FUNCTION_H
- bool isswap(std::vector<int> &, size_t, size_t);
- void perm_r(std::vector<int> &, size_t, size_t, std::vector<std::vector<int>> &);
- void permutation(std::vector<int> &, std::vector<std::vector<int>> &);
- std::ostream &print_arr(const std::vector<int> &vec, std::ostream &os);
- #endif
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