Compilare: user.cpp: In function ‘int main()’: user.cpp:59:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < graf[sursa].size(); i++) ^ user.cpp:77:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < graf[u.k].size(); i++) ^ user.cpp:31:13: warning: unused variable ‘dest’ [-Wunused-variable] int sursa, dest; ^