Compilare: main.cpp: In function 'int difLitere(std::__cxx11::string&, std::__cxx11::string&)': main.cpp:17:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (s1[i] == s2[i] && i < s1.size() && i < s2.size()) ~~^~~~~~~~~~~ main.cpp:17:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (s1[i] == s2[i] && i < s1.size() && i < s2.size()) ~~^~~~~~~~~~~