Eroare de compilare: user.cpp:2: error: 'tr1' is not a namespace-name user.cpp:2: error: expected namespace-name before ';' token user.cpp:53: error: 'unordered_set' was not declared in this scope user.cpp:53: error: template argument 1 is invalid user.cpp:53: error: template argument 2 is invalid user.cpp:53: error: expected unqualified-id before '>' token user.cpp: In function 'bool solve(int)': user.cpp:66: error: 'A' was not declared in this scope user.cpp:89: error: 'unordered_set' was not declared in this scope user.cpp:89: error: expected primary-expression before 'int' user.cpp:89: error: expected `;' before 'int' user.cpp:99: error: 'it' was not declared in this scope