Compilare: main.cpp: In function 'bool Palindrom(std::__cxx11::string)': main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= (aux.length() - 1) / 2; ++i) ~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Init()': main.cpp:110:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < x.length(); ++i) ~~^~~~~~~~~~~~ main.cpp:112:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (x[i] != '0' || i == x.length() - 1) ~~^~~~~~~~~~~~~~~~~ main.cpp:118:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = ptr; i < x.length(); ++i) ~~^~~~~~~~~~~~ main.cpp:108:13: warning: 'ptr' may be used uninitialized in this function [-Wmaybe-uninitialized] int ptr; ^~~