Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:27:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void Search()’: user.cpp:39:11: warning: unused variable ‘st’ [-Wunused-variable] { int i,j,st=1,dr=lin,mid,ok; ^ user.cpp:39:16: warning: unused variable ‘dr’ [-Wunused-variable] { int i,j,st=1,dr=lin,mid,ok; ^ user.cpp:62:14: warning: ‘mid’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (!was[mid]) {was[mid]=1; nrconf++;} ^