Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:25:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graph[element].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:52:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < distanta.size(); i++) ^