Good idea indeed.

• decomposition helped me with the Katan.

If you are struggeling, here are two reminders:

• make sure no values with "0" at the end are in your list
• do not store all values up to 65, but only up to the value you need (n)

no cheating, beautiful code, little understanding needed, very understandable without comments. Very well written. Needs more upvotes.

Use spoiler flag, please.

I enjoy this one for readability and cleverness.
As a beginner, the only two things that I would alter: (1) name of the dict as it overwrites a build-in name and (2) reduce the if/elif/else statement by putting "if last > dict[c] and last == not 0"