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Basics first, then the classics, then company-style assessments. Every problem has tests you run right here; multi-level ones unlock as you go. See the roadmap.
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Bit manipulation
Masks, shifts and IP-address arithmetic.
14 problems
Interview roadmap
Bit manipulation Masks, shifts and IP-address arithmetic.
- Basics: IPv4 addresses as 32-bit integers basics easy
- Watering rota as weekday bitmasks easy
- Cover an IP range with CIDR blocks py · c++ · java medium
- IPv4 / CIDR iterator 5 levels OpenAI medium
- Ordered CIDR firewall 2 levels Databricks py · c++ · java medium
- Distinct goodness values CitadelScale AI py · c++ · java medium
- Palindromic paths toward the root Uber py · c++ · java hard
- Single Number py · c++ · java easy
- Number of 1 Bits py · c++ · java easy
- Counting Bits py · c++ · java easy
- Reverse Bits py · c++ · java easy
- Missing Number py · c++ · java easy
- Sum of Two Integers py · c++ · java medium
- Add Binary py · c++ · java easy