EVM Puzzle full solution

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As you dive into Solidity, it’s quite important to understand what opcodes are and how to use them. I strongly recommend checking this link :

https://www.evm.codes/?fork=grayGlacier

What are the EVM puzzles?

This is a set of 10 puzzles created by Franco Victorio (https://github.com/fvictorio) to get us more comfortable with opcodes. You can find it in the below link. Follow the instruction to get started: https://github.com/fvictorio/evm-puzzles

What are opcodes?

You can understand “opcode” as low-level human-readable instructions to program. Let’s take a look at the following contract:

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;
contract Sum {
  uint256 a = 5;
  uint256 b = 10;
  bool isItTrue = true;
  function addNumbers() public view returns (uint256) {
    return a+b;
  }
}

Here would be the resulting opcode:

000 PUSH1 80
002 PUSH1 40
004 MSTORE
005 PUSH1 05