Compilare: user.cpp: In function ‘int DFS(int, int, 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:15:9: warning: unused variable ‘ok’ [-Wunused-variable] { int i,ok=0,ram=0,act; ^ user.cpp: In function ‘void Search()’: user.cpp:29:7: warning: unused variable ‘i’ [-Wunused-variable] { int i,mid,st=mxc,dr=1LL*mxc*(n-1); ^