Recursion-dictionary Order(Lager)

#1

Any Hint?

How to do this question?

#2

This problem is similar to generating permutations which must be taught in the backtracking section of your course. So refer that first.
Here is a reference code https://ide.codingblocks.com/s/295870

#3

Okay, Thanks

They need to put in the Challenges section of Backtracking.