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Dynamic Programming / Greedy•Pattern: Greedy•Medium

Jump game — can you reach the last index?

Problem Intuition & Objective

Determine if you can reach the end of an array where each element is the max jump length.

Time ComplexityO(n)
Optimal
Space ComplexityO(1)
Memory Bounds
Optimal Algorithmic Approach

Greedy forward scan maintaining maxReach.

Core Invariants & Edge Cases

  • Greedy: track the furthest index reachable so far
  • If current index > furthest, return false (gap exists)
  • If furthest ≥ last index, return true
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