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  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
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  5. 5 Paid Test Task and Follow-Up Interview
  6. 6 Iterative Paid Test Tasks
  7. 7 Office Verification
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Problems > The Egg Drop > Editorial

The Egg Drop — Solution & Editorial

Back to the Problem

Invert the DP: dp[t][e] = the maximum number of floors distinguishable with t drops and e eggs = dp[t−1][e−1] + dp[t−1][e] + 1. Increase t until it reaches F.

Complexity: O(E · answer)

Watch out: The naive floor-by-floor DP is O(E·F²) and dies at F = 109; the trials-first inversion is essential.