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 ## Summary
 
-In this lecture, we introduced control flow in Solidity and wrote a simple but bug-prone sorting algorithm. Solidity looks simple but have many traps. Every month, projects get hacked and lose millions of dollars because of small bugs in the smart contract. To write a safe contract, we need to master the basics of the Solidity and keep practicing.
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+In this lecture, we introduced control flow in Solidity and wrote a simple but bug-prone sorting algorithm. Solidity looks simple but have many traps. Every month, projects get hacked and lose millions of dollars because of small bugs in the smart contract. To write a safe contract, we need to master the basics of the Solidity and keep practicing.
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