Compilare: main.cpp: In function 'int main()': main.cpp:52:9: warning: unused variable 'done' [-Wunused-variable] 52 | int done = 0; | ^~~~ main.cpp: In function 'void Identify_Senators(std::string, int)': main.cpp:80:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 80 | while(i < S.length()){ | ~~^~~~~~~~~~~~ main.cpp:82:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | while(isdigit(S[i]) && i < S.length()){ | ~~^~~~~~~~~~~~