Compilare: main.cpp: In function 'std::vector<std::__cxx11::basic_string<char> > parse(std::string)': main.cpp:15:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 15 | if(NUM.find(c) != -1){ | ~~~~~~~~~~~~^~~~~ main.cpp: In function 'int term()': main.cpp:61:6: warning: unused variable 'ans' [-Wunused-variable] 61 | int ans; | ^~~