A* search ensures optimality under certain conditions, such as having an _______ heuristic and no _______.
- Admissible
- Inadmissible
- Informed
- Uninformed
A* ensures optimality when the heuristic used is admissible, meaning it never overestimates the true cost to reach the goal. Additionally, the algorithm should have no cycles with negative cost to guarantee optimality. This combination ensures that A* explores the most promising paths first, leading to the optimal solution.
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