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 # RareSkills Gas Puzzles 
 
+If you want to learn about gas optimization, take the [Udemy gas optimization course](https://www.udemy.com/course/advanced-solidity-understanding-and-optimizing-gas-costs/?referralCode=C4684D6872713525E349)! 
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 ## Puzzles that are ready for you
 - [x] Distribute (hard)
 - [x] Array Sum (easy)