Compilare: main.cpp: In function 'void BFS(int)': main.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[x].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=n;i++) ^~~ main.cpp:48:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' BFS(h); ^~~