Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:16:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[x].size();i++) ^ user.cpp: In function ‘void DFST(int)’: user.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<GT[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:29:8: warning: unused variable ‘j’ [-Wunused-variable] int i,j,x,y; ^