Compilare: main.cpp: In function 'void bfs(int)': main.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[nod].size();j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:48:4: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:50:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' return 0; ^~~~~~