CustomCC0-1.0#p0191850
Modulo Range Jump Game
Summary
- •Phase 1 / bfs, modulo
- •Reasoning-first competitive programming drill
Problem Description
Given an array of n integers ... and an integer k, start at position 1. In one move, you may jump from position i to any with ( - ) mod k == 0. What is the minimum number of moves needed to reach position n?
How to read this problem in plain language:
- This is a Phase 1 reasoning drill focused on bfs, modulo.
- Typical lenses to test first: bfs, arrays, modulo.
- Constraints reminder: 1 ≤ , 1 ≤ , 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 ≤ , 1 ≤ , 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.
bfsarraysmodulojump game