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Maximize Minimum Difference

USACO · 2024 · December · platinum-3

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combinatorics

The organizer’s problem statement is available at the official source link.

sample trace

Maximize Minimum Difference: combinatorics walkthrough

Maximize Minimum Difference: use the linked editorial?s combinatorics idea on the published sample, then verify the displayed output.

Published input3 4 0 1 1 1 2 0 2 2 3 9 11 2 0 5 6 9 3 0 5 6 9 1 0 4 0 5 6 9 1 0 4 7 5 0 5 6 9 1 0 4 7 2 6 6 0 5 6 9 1 0 4 7 2 6 9 3 7 0 5 6 9 1 0 4 7 2 6 9 3 5 2 8 0 5 6 9 1 0 4 7 2 6 9 3 5 2 7 4 9 0 5 6 9 1 0 4 7 2 6 9 3 5 2 7 4 3 1 10 0 5 6 9 1 0 4 7 2 6 9 3 5 2 7 4 3 1 8 10 10 11 0 1 3 8 2 3 8 5 7 3 3 8 5 7 4 2 4 3 8 5 7 4 2 10 6 5 3 8 5 7 4 2 10 6 8 10 6 3 8 5 7 4 2 10 6 8 10 1 9 7 3 8 5 7 4 2 10 6 8 10 1 9 7 5 8 3 8 5 7 4 2 10 6 8 10 1 9 7 5 2 3 9 3 8 5 7 4 2 10 6 8 10 1 9 7 5 2 3 6 0 5 987 3 654 321 543 210 432 106 2 654 321 543 210 1 654 321 1 0 493 0modelAlgorithm ideaCount the valid arrangements by splitting them into disjoint cases or independent choices.task resultExpected output2 0 1 6 6 1 1 1 1 1 1 1 160 20 8 7 2 1 1 1 1 1 0 538184948 693625420 932738155 251798971
  1. 1

    Cases

    Partition the possible configurations so each valid outcome belongs to one case.
  2. 2

    Count

    Count each case using the independent choices identified by the task.
  3. 3

    Combine

    Sum the disjoint case counts and apply any required modulus or bound.
  4. 4

    Verify the sample

    Use the published sample output to check the result of this idea on the displayed input.
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