Compilare: user.cpp: In function ‘int main()’: user.cpp:12:17: warning: unused variable ‘a’ [-Wunused-variable] int n,k,i,j,a,lmax,l,st,dr; ^ user.cpp:12:26: warning: unused variable ‘st’ [-Wunused-variable] int n,k,i,j,a,lmax,l,st,dr; ^ user.cpp:12:29: warning: unused variable ‘dr’ [-Wunused-variable] int n,k,i,j,a,lmax,l,st,dr; ^ user.cpp:13:10: warning: unused variable ‘mers’ [-Wunused-variable] bool mers; ^ user.cpp:81:9: warning: ‘lmax’ may be used uninitialized in this function [-Wmaybe-uninitialized] so<<lmax<<'\n'; ^