Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<L[k].size(); j++) ^ user.cpp: In function ‘void BFS2(int)’: user.cpp:62:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<L[k].size(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:82:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y; ^