Compilare: user.cpp: In function ‘void BF(int)’: user.cpp:39:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i<graph[nod].size();i++) ^ user.cpp: At global scope: user.cpp:55:5: warning: second argument of ‘int main(int, char*)’ should be ‘char **’ [-Wmain] int main(int argc , char * argv) ^