Compilare: main.cpp: In function 'void readInput()': main.cpp:41:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | while (pos < line.size()) { | ~~~~^~~~~~~~~~~~~ main.cpp:44:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | while (pos < line.size() && isdigit(line[pos])) { | ~~~~^~~~~~~~~~~~~