Compilare: main.cpp: In function 'void bf(int)': main.cpp:28:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph[nod].size();++i) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=n;++i) ^~~ main.cpp:61:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' if(ok) ^~