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Bit Manipulationhard70 minSecurity Engineer

Attack Policy State Compression

Security Engineer signal: bitmask DP + state compression in a attack path analysis context. This is a ProdMatch-owned security engineer drill, framed as a May 2026 Yellow.ai Cloud Security simulation, not a copied platform question.

Company context

Yellow.ai · Cloud Security

Freshness

May 2026

Product surface

attack path analysis

ProdMatch interview simulation based on product-team patterns; not a claim of a real company question.

Question

For attack path analysis, each assets requires a subset of capabilities. Choose the smallest team of services covering all required capabilities; tie-break by lowest total risk.

Input

  • m capabilities and services with capability masks plus risk.

Output

  • Minimum service count and risk, or impossible.

Constraints

  • 1 <= m <= 22
  • 1 <= services.length <= 2000
  • Capability sets may overlap heavily.

Concepts

  • attack graphs
  • policy tries
  • anomaly detection
  • bitmask DP
  • state compression
  • subset enumeration

required={A,B,C}, services=[AB risk 4, C risk 1] -> count=2, risk=5

Approach

Try framing your own approach first. The 30 seconds you think before peeking is where learning happens.

Clean Solution

Reveal the approach first.

How well did you understand?

Your rating tunes when this problem shows up again.

Common Mistakes

  • Do not shift beyond the integer width in fixed-width languages.
  • Keep feature-to-bit mapping stable.

Next Similar Problems

Policy Policy State CompressionhardAnomaly Policy State CompressionmediumSecrets Policy State Compressionhard