CustomCC0-1.0#P017-7321400
Maximum Unique Suffix Array
Summary
- •Phase 4 / hashing/unique/suffix
- •Reasoning-first competitive programming drill
Problem Description
Given an array A of N integers, find the longest suffix such that all elements are unique. Output the length.
How to read this problem in plain language:
- This is a Phase 4 reasoning drill focused on hashing/unique/suffix.
- Typical lenses to test first: suffix, unique, hashing.
- Constraints reminder: 1 ≤ 1 ≤ A[i] ≤ 10^9
Mini examples for mental simulation:
1) Boundary example: Describe why this case is tricky. Explain expected behavior and why naive logic may fail.
2) Adversarial example: Adversarial case where naive greedy/local decision looks correct but fails globally.
Lite-mode writing target:
- Write 1~2 observations that shrink the search space.
- Name one final algorithm and state target complexity explicitly.
- Validate with at least 2 edge cases and one hand simulation.
Constraints
- •1 ≤ 1 ≤ A[i] ≤ 10^9
Analysis
Key Insight
Use this hint to refine your reasoning. This step should reduce search space or formalize correctness. State why this insight changes your algorithm choice.
suffixuniquehashing