25 lines
475 B
Text
25 lines
475 B
Text
open Big_int
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module APSet = Set.Make(
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struct
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type t = big_int
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let compare = compare_big_int
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end)
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let pq = ref (APSet.singleton (big_int_of_int 1))
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let next () =
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let m = APSet.min_elt !pq in
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let ( * ) = mult_int_big_int in
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pq := APSet.(remove m !pq |> add (2*m) |> add (3*m) |> add (5*m));
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m
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let () =
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let n = 1_000_000 in
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for i = 1 to (n-1)
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do
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ignore (next ())
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done;
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Printf.printf "\nThe %dth is %s\n" n (string_of_big_int (next ()));
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