Compilare: In file included from user.cpp:5:0: user.cpp: In function ‘int dfs(int)’: user.cpp:94:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(d[*it]==pass[x].size()); ^ user.cpp:108:37: warning: ‘bus’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<"Move "<<*itt<<" "<<*it<<" "<<bus<<'\n'; ^