Compilare: user.cpp: In function ‘void stergere(int, int)’: user.cpp:17:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < v[ S ].a.size(); k++) ^ user.cpp:20:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < v[ s ].a.size(); k++) ^ user.cpp: In function ‘void cautare(int)’: user.cpp:27:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < v[ i ].a.size(); k++) ^ user.cpp:28:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[ v[ i ].a[ k ] ].a.size() < mi){ ^ user.cpp: In function ‘int main()’: user.cpp:49:13: warning: unused variable ‘xx’ [-Wunused-variable] int xx; ^ user.cpp:54:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ xx ].a.size(); i++) ^