Puzzle 11: Memory Serves You Well

Repeatedly solving the same problem is boring for a human, and inefficient in a computer program or algorithm. This video describes the powerful technique of memoization to avoid redundant work, and applies it to efficiently solve a coin selection puzzle.

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Puzzle Description

Python Code


  • Do one or more of the exercises in the Memory Serves You Well puzzle.


Programming Constructs and Algorithmic Paradigms Covered in this Puzzle

  • Dictionary creation and lookup
  • Exceptions
  • Memoization in recursive search