Eroare de compilare: user.cpp:11: error: expected constructor, destructor, or type conversion before '<' token user.cpp: In function 'int main()': user.cpp:16: error: 'vector' was not declared in this scope user.cpp:16: error: 'pair' was not declared in this scope user.cpp:16: error: expected primary-expression before 'int' user.cpp:16: error: expected `;' before 'int' user.cpp:23: error: 'set' was not declared in this scope user.cpp:23: error: 'make_pair' was not declared in this scope user.cpp:25: error: 'sets' was not declared in this scope user.cpp:25: error: 'set' was not declared in this scope user.cpp:27: error: 'sets1' was not declared in this scope user.cpp:30: error: 'set1' was not declared in this scope