Compilare: user.cpp: In function ‘int main(int, char**)’: user.cpp:18:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (contor < sir.length()){ ^ user.cpp:22:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) ^ user.cpp:38:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) ^ user.cpp:53:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cale.size(); i++) ^