Compilare: user.cpp: In function ‘void back(int, int)’: user.cpp:39:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pozitie == numere.size() - 1) ^ user.cpp:42:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(numarCurent >= a && numarCurent <= b) ^ user.cpp:42:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(numarCurent >= a && numarCurent <= b) ^ user.cpp: In function ‘int main()’: user.cpp:78:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < raspuns.size(); i++) ^