Compilare: user.cpp: In function ‘void bfs(int, int)’: user.cpp:33:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < graph[element].size(); i++) ^ user.cpp:42:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < visited.size(); i++) h << visited[i] << " "; ^ user.cpp:23:7: warning: unused variable ‘found’ [-Wunused-variable] bool found; ^ user.cpp: In function ‘int main()’: user.cpp:49:14: warning: unused variable ‘a’ [-Wunused-variable] int x, y, i,a,nod; ^