• Yep. Hopefully binary search or something is all you need but I'm skeptical.

    See if you can spot a pattern in the calculations done on the input values. I have something which I suspect is right, but failed to collect the right information in my recursive call.

    D23 done, A* too slow so I went with recursion and memoising which was shockingly fast by comparison

    My basic approach using Dijkstra was ~4s, I did some mild perusal of other people's solutions and with an appropriate cost-function for A* got down to ~150ms.

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