CustomCC0-1.0#cpq0202100
Minimal Range Maximum Query After Deletion
Summary
- •Phase 6 / offline/segment-tree
- •Reasoning-first competitive programming drill
Problem Description
You're given an array of n integers and q queries. Each query deletes a value at a given index. After each deletion, output the maximum value of the largest remaining contiguous subarray.
How to read this problem in plain language:
- This is a Phase 6 reasoning drill focused on offline/segment-tree.
- Typical lenses to test first: offline, segment-tree, range-max.
- Constraints reminder: 1 ≤ n, , 1 ≤
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 ≤ n, , 1 ≤
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.
offlinesegment-treerange-maxdeletion