Eroare de compilare: user.cpp: In instantiation of ‘T exp(T, int, T) [with T = std::array<std::array<long long unsigned int, 2u>, 2u>]’: user.cpp:28:54: required from here user.cpp:23:18: error: no match for ‘operator*’ (operand types are ‘const std::array<std::array<long long unsigned int, 2u>, 2u>’ and ‘const std::array<std::array<long long unsigned int, 2u>, 2u>’) return x ? exp(e*e, x/2, x&1 ? rez*e : rez) : rez; } ^ user.cpp:23:18: note: candidate is: user.cpp:11:14: note: template<class T, long unsigned int n, long unsigned int m, long unsigned int p> mat<T, n, m> operator*(mat<T, n, p>&, mat<T, p, m>&) mat<T, n, m> operator*(const mat<T, n, p>& a, const mat<T, p, m>& b){ ^ user.cpp:11:14: note: template argument deduction/substitution failed: user.cpp:23:18: note: mismatched types ‘long unsigned int’ and ‘#‘integer_cst’ not supported by dump_type#<type error>’ return x ? exp(e*e, x/2, x&1 ? rez*e : rez) : rez; } ^ user.cpp:23:18: note: ‘const std::array<std::array<long long unsigned int, 2u>, 2u>’ is not derived from ‘mat<T, n, p>’ user.cpp:23:36: error: no match for ‘operator*’ (operand types are ‘const std::array<std::array<long long unsigned int, 2u>, 2u>’ and ‘const std::array<std::array<long long unsigned int, 2u>, 2u>’) return x ? exp(e*e, x/2, x&1 ? rez*e : rez) : rez; } ^ user.cpp:23:36: note: candidate is: user.cpp:11:14: note: template<class T, long unsigned int n, long unsigned int m, long unsigned int p> mat<T, n, m> operator*(mat<T, n, p>&, mat<T, p, m>&) mat<T, n, m> operator*(const mat<T, n, p>& a, const mat<T, p, m>& b){ ^ user.cpp:11:14: note: template argument deduction/substitution failed: user.cpp:23:36: note: mismatched types ‘long unsigned int’ and ‘#‘integer_cst’ not supported by dump_type#<type error>’ return x ? exp(e*e, x/2, x&1 ? rez*e : rez) : rez; } ^ user.cpp:23:36: note: ‘const std::array<std::array<long long unsigned int, 2u>, 2u>’ is not derived from ‘mat<T, n, p>’ user.cpp: In function ‘T exp(T, int, T) [with T = std::array<std::array<long long unsigned int, 2u>, 2u>]’: user.cpp:23:53: warning: control reaches end of non-void function [-Wreturn-type] return x ? exp(e*e, x/2, x&1 ? rez*e : rez) : rez; } ^