Compilare: user.cpp: In function ‘void dfs(int, int, int)’: user.cpp:16:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < arb[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:70:9: warning: unused variable ‘flag’ [-Wunused-variable] int flag,j,nx,ny,nz,x,p,y,z,b,c,d,m,i,a; ^ user.cpp:70:22: warning: unused variable ‘nz’ [-Wunused-variable] int flag,j,nx,ny,nz,x,p,y,z,b,c,d,m,i,a; ^