Compilare: user.cpp: In function ‘void sort(std::vector<int>, int, int)’: user.cpp:19:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V.size(); i++) ^ user.cpp:24:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V.size(); i++) ^ user.cpp:29:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V2.size(); i++) ^ user.cpp:35:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V1.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:54:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < aux.size(); j++) ^