Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:18:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void Solve()’: user.cpp:29:45: warning: unused variable ‘mx’ [-Wunused-variable] { int i1,i2,i3,x,y,z,v1,v2,v3,v4,tot=sum[1],mx,mn; ^ user.cpp:29:48: warning: unused variable ‘mn’ [-Wunused-variable] { int i1,i2,i3,x,y,z,v1,v2,v3,v4,tot=sum[1],mx,mn; ^