Compilare: user.cpp:11:1: warning: ‘typedef’ was ignored in this declaration [enabled by default] }; ^ user.cpp:16:1: warning: ‘typedef’ was ignored in this declaration [enabled by default] }; ^ user.cpp: In function ‘void backtr(int)’: user.cpp:44:29: warning: unused variable ‘Q’ [-Wunused-variable] int u, iu, ju, s, i, j, Q, q; ^ user.cpp:44:32: warning: unused variable ‘q’ [-Wunused-variable] int u, iu, ju, s, i, j, Q, q; ^ user.cpp: In function ‘int main()’: user.cpp:95:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, contor = 0; ^ user.cpp:95:15: warning: unused variable ‘contor’ [-Wunused-variable] int i, j, contor = 0; ^