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Counting› Counting Fundamentals› 1.3 Complements and Inclusion-Exclusion
Problem 1.25 ★★★Medium Coming soon

Avoiding Four-Term Progressions

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Try 1.20 Integers Containing a Zero
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Section 1.3

Complements and Inclusion-Exclusion Toolkit
  1. 1.20Integers Containing a Zero
  2. 1.21Starts With 1 or Ends With 00
  3. 1.22Codes With a Repeated Digit
  4. 1.23Strings Without Repeated Neighbours
  5. 1.24Dice Hitting Every Total
  6. 1.25Avoiding Four-Term Progressions
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