Compilare: main.cpp: In function 'void bfs(int)': main.cpp:18:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[x].size(); ++i) ~^~~~~~~~~~~~ main.cpp:18:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=0; i<v[x].size(); ++i) ^~~ main.cpp:25:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' q.pop(); ^