Eroare de compilare: user.cpp:2:19: error: multiset: No such file or directory user.cpp:10: error: expected constructor, destructor, or type conversion before ‘<’ token user.cpp:11: error: expected constructor, destructor, or type conversion before ‘<’ token user.cpp: In function ‘int main()’: user.cpp:31: error: ‘S’ was not declared in this scope user.cpp:35: error: ‘it’ was not declared in this scope user.cpp:21: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:22: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result