D - Make Them Even

  • image
  • Thoughts.
    • This paragraph is a misunderstanding
      • There is no benefit to moving something that is already even.
      • Losses when odd numbers join even numbers.
      • Does it make sense to move even numbers if it’s to open the way for them not to merge?
    • I mistakenly thought it was moving the whole mountain, but it was “moving one piece.”
      • then the largest solution is the one that once all the coins in the odd-numbered pile are removed and two coins are dealt in each of the zero squares
      • You’re asked to output the steps, but they don’t have to be the shortest steps, just process them in order.
  • Official Explanation
    • I see in the sample that “an even number of coins were placed” includes zero coins.
    • Then we just move one from one odd-numbered pile to another odd-numbered pile.

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