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19 lines
780 B
Markdown
19 lines
780 B
Markdown
# 12
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What a ride...
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So first I tried without A-Star. Well that of course did not stand a chance against the actual dataset.
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I think my a start implementation is flawed, of the heuristics are not optimal. It starts in a straight line, but ends up checking every field anyways. So it's more like a Dijkstra. But it works.
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The difference between Manhattan and Euclidean distance as `h(x)` did not help two. Went form 6939 iterations to 6974.
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The second part was quick. I reversed the search, starting from the end, removed the heuristic, so ti's now a classic Dijkstra, and instead of searching for a specific node, i stopped at the first encounter of an `a` or `0` elevation.
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<details>
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<summary>Solutions</summary>
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<ol>
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<li>497</li>
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<li>492</li>
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</ol>
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</details>
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