Compilare: main.cpp: In function 'std::pair<int, int> parse(int&)': main.cpp:84:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 84 | while(pos < input.size() && ch != ')' && ch != '*' && ch != ']') | ~~~~^~~~~~~~~~~~~~