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Re:Advent of Code 2025: Number of puzzles reduce from 25 to ... by LPisGood on Sunday October 26, 2025 @04:48PM (#45715088)
For more examples of such problems check Jane street puzzles of the month
Re:Advent of Code 2025: Number of puzzles reduce from 25 to ... by petesergeant on Monday October 27, 2025 @02:09AM (#45717873)
Those will almost certainly be too hard for the target audience