Eroare de compilare: user.cpp:4:25: error: unordered_set: No such file or directory user.cpp:13: error: expected constructor, destructor, or type conversion before '<' token user.cpp:14: error: expected constructor, destructor, or type conversion before '<' token user.cpp: In function 'void initializare()': user.cpp:21: error: 'v' was not declared in this scope user.cpp:27: error: 'mc_in' was not declared in this scope user.cpp: In function 'int check()': user.cpp:32: error: 'unordered_set' was not declared in this scope user.cpp:32: error: expected primary-expression before 'int' user.cpp:32: error: expected `;' before 'int' user.cpp:35: error: 'v' was not declared in this scope user.cpp:39: error: 'v' was not declared in this scope user.cpp:42: error: 'it' was not declared in this scope user.cpp:42: error: 'v' was not declared in this scope user.cpp:47: error: 'mc_in' was not declared in this scope user.cpp:54: error: 'mc_in' was not declared in this scope user.cpp: In function 'int main()': user.cpp:81: error: 'mc_ext' was not declared in this scope user.cpp:84: error: 'v' was not declared in this scope user.cpp:92: error: 'v' was not declared in this scope