Compilare: user.cpp: In function ‘void tiere()’: user.cpp:15:6: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(long i=1;i<=n;++i) ^~~ user.cpp:17:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ cost[1]=0; ^~~~ user.cpp: In function ‘void sol()’: user.cpp:35:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long j=0;j<v[node].size();++j) ~^~~~~~~~~~~~~~~