Compilare: user.cpp: In function ‘std::vector<std::vector<int> > FlipVert(std::vector<std::vector<int> >)’: user.cpp:17:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V.size();i++){ ^ user.cpp:18:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<V[i].size();j++){ ^ user.cpp: In function ‘std::vector<std::vector<int> > FlipOr(std::vector<std::vector<int> >)’: user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V.size();i++){ ^ user.cpp:28:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<V[i].size();j++){ ^ user.cpp: In function ‘std::vector<std::vector<int> > Transpusa(std::vector<std::vector<int> >)’: user.cpp:37:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V.size();i++){ ^ user.cpp:38:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<V[i].size();j++){ ^ user.cpp: In function ‘bool Egalitate(std::vector<std::vector<int> >, std::vector<std::vector<int> >)’: user.cpp:67:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A.size();i++){ ^ user.cpp:68:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<A[i].size();j++){ ^