Compilare: main.cpp: In function 'void adaug(std::__cxx11::string, int)': main.cpp:17:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); ++i) { ~~^~~~~~~~~~ main.cpp: In function 'int nr_aparitii(std::__cxx11::string)': main.cpp:32:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); ++i) { ~~^~~~~~~~~~ main.cpp: In function 'int cmlpc(std::__cxx11::string)': main.cpp:45:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size() - 1; ++i) { ~~^~~~~~~~~~~~~~