檢定的測資很不嚴謹 when k >=3 and k < n-2 output is wrong. EX : n =6, k =3 output is 20 but most AC program output 19.
檢定的測資很不嚴謹
when k >=3 and k < n-2 output is wrong.
EX : n =6, k =3 output is 20
but most AC program output 19.