Eroare de compilare: user.cpp:3:28: error: ext/unordered_set: No such file or directory user.cpp:14: error: expected constructor, destructor, or type conversion before ‘<’ token user.cpp: In function ‘int main()’: user.cpp:27: error: ‘v’ was not declared in this scope user.cpp:28: error: ‘v1’ was not declared in this scope user.cpp:32: error: ‘v’ was not declared in this scope user.cpp:34: error: ‘v’ was not declared in this scope user.cpp:38: error: ‘v1’ was not declared in this scope user.cpp:40: error: ‘v1’ was not declared in this scope user.cpp:50: error: ‘v’ was not declared in this scope user.cpp:56: error: ‘unordered_set’ was not declared in this scope user.cpp:56: error: expected primary-expression before ‘int’ user.cpp:56: error: expected ‘;’ before ‘int’ user.cpp:56: error: ‘it’ was not declared in this scope user.cpp:57: error: ‘v1’ was not declared in this scope user.cpp:66: error: ‘unordered_set’ was not declared in this scope user.cpp:66: error: expected primary-expression before ‘int’ user.cpp:66: error: expected ‘;’ before ‘int’ user.cpp:66: error: ‘it’ was not declared in this scope user.cpp:66: error: ‘v1’ was not declared in this scope