Compilare: main.cpp: In function 'std::__cxx11::string getNewString(std::__cxx11::string&, std::__cxx11::string&)': main.cpp:13:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); ++i){ ~~^~~~~~~~~~ main.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < b.size() && k < b.size()){ ~~^~~~~~~~~~ main.cpp:16:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < b.size() && k < b.size()){ ~~^~~~~~~~~~ main.cpp:27:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (idk < b.size()){ ~~~~^~~~~~~~~~ main.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < b.size(); ++j){ ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (aux.size() < s[(i | (1 << j))]){ ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~