Compilare: user.cpp: In function ‘void DFS(int, int, int)’: user.cpp:14:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(i=0;i<v[x].size();i++) ^ user.cpp:19:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:29:9: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,x,y,c,nod; ^