Compilare: main.cpp: In function 'void Z(std::__cxx11::string, std::__cxx11::string, int*)': main.cpp:23:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<x.length(); i++) ~^~~~~~~~~~~ main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (r < x.length() && x[r] == x[r-l]) ~~^~~~~~~~~~~~ main.cpp:45:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (r < x.length() && x[r] == x[r-l]) ~~^~~~~~~~~~~~