hauleth.dev
this repo has no description
chore: small cleanups
+114
-20
2022/day12.livemd
+114
-20
2022/day12.livemd
···
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```
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warning: variable "graph" is unused (there is a variable with the same name in the context, use the pin operator (^) to match on it or prefix this variable with underscore if it is not meant to be used)
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2022/day12.livemd#cell:7urrvoyk6ltuxa4kdqc63nncfh37x2fn:30
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+
2022/day12.livemd#cell:6nz6sdhe57lxfvshc57dctj7qaalwwz3:42
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```
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···
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<!-- livebook:{"output":true} -->
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```
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[32256290, 409066827, 186924390, 1502865800, 887663648, 2543466388, 697356458, 1070575781,
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1659702078, 4000784021, 1947564743, 2361038489, 3904452243, 3615669650, 270460033, 1281654811,
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3153535741, 2393890474, 3946102901, 2210758189, 2982223724, 2654353783, 2656280720, 3935389969,
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2818948768, 4279780723, 3595206681, 3496428192, 2269119594, 2583881244, 3997991000, 520325395,
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457672928, 1453390554, 3289433936, 2574402082, 1560492086, 3242480874, 389839366, 4176230802,
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1147783117, 2469841095, 2034019869, 438932546, 1799582666, 1100008137, 467060197, 162439868,
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3928107970, 800548913, ...]
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+
[
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{59, 38},
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{38, 5},
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{76, 17},
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{66, 36},
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+
{54, 26},
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{10, 18},
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{3, 21},
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{42, 40},
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{73, 32},
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{43, 36},
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{2, 9},
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{80, 31},
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{20, 12},
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{63, 11},
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{5, 15},
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{76, 4},
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{136, 4},
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{3, 9},
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{90, 11},
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{85, 39},
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{24, 29},
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{91, 28},
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{55, 27},
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{108, 10},
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{84, 4},
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{9, 9},
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{161, 38},
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{3, 33},
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{68, 22},
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{143, 3},
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{49, 8},
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{70, 26},
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{39, 25},
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{18, 13},
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{88, 0},
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{32, 21},
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{96, 3},
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{84, 40},
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{53, 1},
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{88, 30},
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{120, 10},
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{36, 4},
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{115, 13},
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{112, 3},
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{42, 0},
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{4, 17},
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{35, 12},
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{114, 19},
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{20, ...},
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{...},
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...
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]
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```
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```elixir
···
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if has_negative_cycle?(distances, weights) do
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nil
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else
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Map.new(distances, fn {k, v} -> {Map.fetch!(vertices, k), v} end)
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Map.new(distances, fn {k, v} -> {Map.fetch!(vs, k), v} end)
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end
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end
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···
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<!-- livebook:{"output":true} -->
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```
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{:module, BellmanFord, <<70, 79, 82, 49, 0, 0, 19, ...>>, {:has_negative_cycle?, 2}}
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{:module, BellmanFord, <<70, 79, 82, 49, 0, 0, 18, ...>>, {:has_negative_cycle?, 2}}
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```
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```elixir
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min_paths =
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paths =
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tgraph
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# |> Graph.bellman_ford(stop)
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|> BellmanFord.call(stop)
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|> Map.take(lowest)
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|> Map.values()
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```
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<!-- livebook:{"output":true} -->
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```
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[:infinity, :infinity, :infinity, 454, :infinity, :infinity, :infinity, :infinity, :infinity,
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:infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity,
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:infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity,
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:infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity,
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:infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity, :infinity,
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:infinity, :infinity, :infinity, :infinity, :infinity, ...]
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%{
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{76, 13} => :infinity,
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{38, 2} => :infinity,
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{1, 26} => 430,
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{140, 11} => 100,
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{32, 15} => 388,
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+
{89, 14} => 328,
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{35, 30} => 392,
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{156, 9} => :infinity,
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+
{4, 5} => 454,
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+
{74, 12} => :infinity,
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+
{11, 39} => 425,
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+
{131, 5} => 323,
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+
{22, 38} => 413,
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+
{29, 25} => 403,
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+
{86, 10} => :infinity,
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+
{83, 36} => 366,
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+
{29, 26} => 402,
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+
{47, 27} => :infinity,
367
+
{9, 34} => 426,
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+
{137, 16} => 12,
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+
{90, 0} => :infinity,
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+
{103, 39} => 289,
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+
{126, 13} => :infinity,
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+
{47, 38} => :infinity,
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+
{128, 35} => 268,
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+
{20, 3} => 412,
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{145, 20} => 24,
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+
{143, 39} => 247,
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+
{79, 17} => 335,
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+
{75, 0} => :infinity,
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+
{150, 18} => 167,
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+
{147, 10} => 178,
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+
{148, 26} => 75,
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+
{76, 2} => :infinity,
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+
{138, 9} => 104,
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+
{58, 33} => 372,
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+
{150, 5} => 296,
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+
{54, 31} => 374,
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+
{22, 37} => 412,
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+
{75, 36} => :infinity,
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+
{91, 35} => :infinity,
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+
{143, 4} => :infinity,
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+
{121, 27} => 283,
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+
{91, 38} => :infinity,
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+
{159, 26} => 268,
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+
{131, 24} => 124,
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{58, 10} => 367,
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{111, 14} => :infinity,
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{75, ...} => 345,
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+
{...} => 411,
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+
...
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+
}
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```
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```elixir
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Enum.min(min_paths)
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paths
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|> Map.take(lowest)
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+
|> Map.values()
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|> Enum.min()
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```
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<!-- livebook:{"output":true} -->