Compilare: main.cpp: In function 'std::string division3(std::string)': main.cpp:55:26: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 55 | while (number.size() > idx) { | ~~~~~~~~~~~~~~^~~~~ main.cpp: In function 'void solve()': main.cpp:136:9: warning: unused variable 'sum' [-Wunused-variable] 136 | int sum=0; | ^~~