Compilare: main.cpp: In function 'bool bfs()': main.cpp:26:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i = 1; i <= n; ++i) ^~~ main.cpp:28:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' queue<int>q; ^~~~~ main.cpp:36:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); ++i) ~~^~~~~~~~~~~~~~~