I was trying to learn burnside lemma and now i feel it's one of the very rare topic in competitive programming.

Here are some resources i found very useful:

1. math.stackexchange

2. petr's blog

3. imomath

4. Hackerrank Blog

5. AlgoWiki

Here are some problems related to burnside lemma:

1. Necklace

2. Necklace of Beads

3. The Beautiful Board

4. Lucy and the Flowers

5. Count the Necklaces

6. Cube Coloring

7. Magic Bracelet

8. Sorting Machine

9. Pizza Toppings

10. Drum Decorator

11. Alphabet Soup

Is there some other good resources or problems related to burnside lemma? Please suggest some more.