753. Cracking the Safe

There is a safe protected by a password. The password is a sequence of n digits where each digit can be in the range [0, k - 1]. The safe has a peculiar way of checking the password. When you enter in a sequence, it checks the most recent n digits that were entered each time you type a digit. - For example, the correct password is "345" and you enter in "012345": - After typing 0, the most rec