Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:18:17: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int maxim=0,ok=0; ^ user.cpp: In function ‘int main()’: user.cpp:36:24: warning: unused variable ‘j’ [-Wunused-variable] register int i,tot,j,x,y; ^ user.cpp:37:10: warning: unused variable ‘ok’ [-Wunused-variable] bool ok; ^ user.cpp:40:9: warning: unused variable ‘nr’ [-Wunused-variable] int nr=n; ^