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Question #33 Difficulty: 3

According to the Solidity 0.8.17 compiler (200 optimization runs) 

    // What does this assembly return when f([1,2,3]) is called

contract C {
  function f(uint[] memory data) public pure returns (uint u) {
    for (uint i = 0; i < data.length; ++i) {
      assembly {
        u:= add(u, mload(add(add(data, 0x20), mul(i, 0x20))))
      }
    }
  }
}

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