Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:45:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j< L[k].size(); j++) ^ user.cpp: In function ‘void Afisare()’: user.cpp:58:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘int main()’: user.cpp:66:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^