Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:21:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<graph[element].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:46:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<graph[j].size();k++) ^ user.cpp:52:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<visited.size();i++)//am putea salva size in variabila sa nu o calculeze mereu ^