Compilare: main.cpp: In function 'void buildAutomaton(std::__cxx11::string)': main.cpp:17:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < s.length(); i++) { ~~^~~~~~~~~~~~ main.cpp: In function 'void findMatches(std::__cxx11::string, std::__cxx11::string)': main.cpp:30:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < b.length(); i++) { ~~^~~~~~~~~~~~ main.cpp:37:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (aPrefixLength == a.length()) { ~~~~~~~~~~~~~~^~~~~~~~~~~~~