Pattern

Variable Window + Frequency Map

3 problems in the roadmap use this pattern.

• Longest Repeating Character Replacement Medium

  in Sliding Window

  Reported at: GoogleAmazonUber+1
• Fruit Into Baskets Medium

  in Sliding Window

  Reported at: Amazon
• Minimum Window Substring Hard

  in Sliding Window

  Reported at: MetaAmazonMicrosoft+6