結果

問題 No.875 Range Mindex Query
ユーザー guriceringuricerin
提出日時 2020-01-30 00:12:00
言語 F#
(F# 4.0)
結果
WA  
実行時間 -
コード長 3,668 bytes
コンパイル時間 4,127 ms
コンパイル使用メモリ 176,092 KB
実行使用メモリ 44,396 KB
最終ジャッジ日時 2023-10-14 08:02:17
合計ジャッジ時間 13,862 ms
ジャッジサーバーID
（参考情報） 		judge11 / judge14
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 97 ms
21,260 KB
testcase_01 WA -
testcase_02 AC 111 ms
21,620 KB
testcase_03 WA -
testcase_04 WA -
testcase_05 AC 106 ms
23,500 KB
testcase_06 WA -
testcase_07 AC 108 ms
23,496 KB
testcase_08 WA -
testcase_09 WA -
testcase_10 WA -
testcase_11 WA -
testcase_12 WA -
testcase_13 WA -
testcase_14 WA -
testcase_15 WA -
testcase_16 WA -
testcase_17 WA -
testcase_18 WA -
権限があれば一括ダウンロードができます
コンパイルメッセージ
Microsoft (R) F# Compiler version 11.0.0.0 for F# 5.0
Copyright (c) Microsoft Corporation. All Rights Reserved.

/home/judge/data/code/Main.fs(107,13): warning FS0025: Incomplete pattern matches on this expression. For example, the value '[|_; _; _; _|]' may indicate a case not covered by the pattern(s).

/home/judge/data/code/Main.fs(95,9): warning FS0025: Incomplete pattern matches on this expression. For example, the value '[|_; _; _|]' may indicate a case not covered by the pattern(s).

ソースコード

diff # 

open System
open System.Collections.Generic

[<AutoOpen>]
module Cin =
    let read f = stdin.ReadLine() |> f
    let reada f = stdin.ReadLine().Split() |> Array.map f
    let readChars() = read string |> Seq.toArray
    let readInts() = readChars() |> Array.map (fun x -> Convert.ToInt32(x.ToString()))

[<AutoOpen>]
module Cout =
    let writer = new IO.StreamWriter(new IO.BufferedStream(Console.OpenStandardOutput()))
    let print (s: string) = writer.Write s
    let println (s: string) = writer.WriteLine s
    let inline puts (s: ^a) = string s |> println

type SegmentTree<'Monoid> =
    {
      /// 実データの要素数(葉ノードの数)
      size: int
      height: int
      /// モノイドの単位元
      unity: 'Monoid
      nodes: 'Monoid array
      /// 二項演算
      merge: Merge<'Monoid> }

and Merge<'a> = 'a -> 'a -> 'a

[<RequireQualifiedAccess>]
[<CompilationRepresentation(CompilationRepresentationFlags.ModuleSuffix)>]
module SegmentTree =

    let internal sizeAndHeight n =
        let rec loop sAcc hAcc =
            if sAcc < n then loop (sAcc <<< 1) (hAcc + 1) else (sAcc, hAcc)
        loop 1 0

    let internal parent i = (i - 1) >>> 1
    let internal leftChild i = (i <<< 1) + 1
    let internal rightChild i = (i <<< 1) + 2
    let internal leafIdx tree k = k + tree.size - 1

    let init (n: int) (f: Merge<'Monoid>) (unity: 'Monoid) =
        let size, height = sizeAndHeight n
        let nodes = Array.init (size * 2) (fun _ -> unity)
        { SegmentTree.size = size
          height = height
          unity = unity
          nodes = nodes
          merge = f }

    let build (sq: 'Monoid seq) tree: unit =
        let sq = Seq.indexed sq
        let nodes = tree.nodes
        for (i, s) in sq do
            let li = leafIdx tree i
            nodes.[li] <- s
        let len = Seq.length sq
        for i in len - 2 .. -1 .. 0 do
            let lc, rc = leftChild i, rightChild i
            nodes.[i] <- tree.merge nodes.[lc] nodes.[rc]

    /// 一点更新
    let update k x tree: unit =
        let k = leafIdx tree k
        let nodes = tree.nodes
        nodes.[k] <- x
        // 子から親に伝搬
        let mutable p = k
        while p > 0 do
            p <- parent p
            let lc, rc = leftChild p, rightChild p
            nodes.[p] <- tree.merge nodes.[lc] nodes.[rc]

    let rec internal queryCore (a: int) (b: int) (k: int) (l: int) (r: int) tree: 'Monoid =
        if r <= a || b <= l then
            tree.unity
        elif a <= l && r <= b then
            tree.nodes.[k]
        else
            let lc, rc, mid = leftChild k, rightChild k, (l + r) >>> 1
            let lv = queryCore a b lc l mid tree
            let rv = queryCore a b rc mid r tree
            tree.merge lv rv

    let get k tree =
        let k = leafIdx tree k
        tree.nodes.[k]

    let query a b tree: 'Monoid = queryCore a b 0 0 tree.size tree

let main() =
    let [| N; Q |] = reada int
    let A = reada int |> Array.indexed

    let f x y =
        let xi, xv = x
        let yi, yv = y
        if xv <= yv then x else y

    let e = -1, Int32.MaxValue
    let seg = SegmentTree.init N f e
    SegmentTree.build A seg
    for i in 0 .. Q - 1 do
        let [| q; l; r |] = reada int
        let l, r = l - 1, r - 1
        match q with
        | 1 ->
            let li, lv = seg |> SegmentTree.get l
            let ri, rv = seg |> SegmentTree.get r
            seg |> SegmentTree.update l (l, rv)
            seg |> SegmentTree.update r (r, lv)
        | _ ->
            let i, v = seg |> SegmentTree.query l (r + 1)
            printfn "%d" (i + 1)
    ()

main()
writer.Close()
0