Editorial for Stardust Snow


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Submitting an official solution before solving the problem yourself is a bannable offence.

We can turn this problem into a 4D dynamic programming question where we keep track of horizontal position, time, snowflakes left, and temperature left. At each position, consider two cases, one where Griffy takes the snowflake (if a snowflake exists at that position and time), and the other where Griffy does not take the snowflake. TIME STARTS AT 0.

Skills needed: Dynamic programming

Time complexity: about \mathcal O(RCKBM)


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