Compilare: main.cpp: In function 'void readInput()': main.cpp:42:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | while (pos < line.size()) { | ~~~~^~~~~~~~~~~~~ main.cpp:45:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | while (pos < line.size() && isdigit(line[pos])) { | ~~~~^~~~~~~~~~~~~