Compilare: main.cpp: In function 'int manacher(std::__cxx11::string, int*)': main.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < s.length(); ++i){ ~~^~~~~~~~~~~~ main.cpp:26:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < t.length(); ++i){ ~~^~~~~~~~~~~~ main.cpp:35:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(l >= 0 && r < t.length() && t[l] == t[r]) ~~^~~~~~~~~~~~ main.cpp:41:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < t.length(); ++i) ~~^~~~~~~~~~~~