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      std::partial_sort

      提供: cppreference.com
      < cpp‎ | algorithm

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      C++
       
      アルゴリズムライブラリ
      機能します
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      Functions
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      シーケンス動作を非改変
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      Non-modifying sequence operations
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      シーケンス動作を変更する
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      Modifying sequence operations
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      操作を仕切る
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      Partitioning operations
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      （ソートされた範囲で）ソート操作
      Original:
      Sorting operations (on sorted ranges)
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      バイナリ検索操作（ソート範囲で）
      Original:
      Binary search operations (on sorted ranges)
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      （ソートされた範囲で）操作を設定します
      Original:
      Set operations (on sorted ranges)
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      ヒープ操作
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      Heap operations
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      最小値/最大値操作
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      Minimum/maximum operations
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      数値演算
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      Numeric operations
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      Cライブラリ
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      C library
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      Defined in header <algorithm>
      template<class RandomIt >
      void partial_sort( RandomIt first, RandomIt middle, RandomIt last );
      		 (1)
      template<class RandomIt, class Compare >
      void partial_sort( RandomIt first, RandomIt middle, RandomIt last, Compare comp );
      		 (2)
      を昇順で並べ替え範囲[first, last)内の要素のいくつかを示しています。これらの要素の最初のmiddle - firstは範囲[first, middle)に配置されます。等しい要素の順序は保持される保証はありません。レンジ[middle, last)の残りの要素の順序は不定である。最初のバージョンは、要素を比較するoperator<使用して、2番目のバージョンは、指定された比較関数compを使用しています.
      Original:
      Sorts some of the elements in the range [first, last) in ascending order. The first middle - first of these elements are placed in the range [first, middle). The order of equal elements is not guaranteed to be preserved. The order of the remaining elements in the range [middle, last) is unspecified. The first version uses operator< to compare the elements, the second version uses the given comparison function comp.
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      目次

      [編集]パラメータ

      first, last -
      ソートする要素の範囲
      Original:
      the range of elements to sort
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      comp - 比較関数. 最初の値が二つ目の値より小さい 場合、 ​trueを返します.

      比較関数のシグネチャは以下と同等でなければなりません.

       bool cmp(const Type1 &a, const Type2 &b);

      シグネチャはconstを含まなくても構いませんが, 比較関数は渡されたオブジェクトを変更してはなりません.
      The types Type1 and Type2 must be such that an object of type RandomIt can be dereferenced and then implicitly converted to both of them. ​

      型の要件
      -
      RandomIt は ValueSwappable and RandomAccessIterator。
      -
      The type of dereferenced RandomIt must meet the requirements of MoveAssignable and MoveConstructible.

      [編集]値を返します

      (なし)

      [編集]複雑性

      O(N·log2(N))、N =std::distance(first, last)のcmpアプリケーション。追加のメモリが利用可能であれば、複雑さがO(N·log(N))です
      Original:
      O(N·log2(N)), where N =std::distance(first, last) applications of cmp. If additional memory is available, then the complexity is O(N·log(N))
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      [編集]例

      このコードを実行します
      #include <algorithm>#include <functional>#include <array>#include <iostream>   int main(){std::array<int, 10> s{5, 7, 4, 2, 8, 6, 1, 9, 0, 3};   std::partial_sort(s.begin(), s.begin()+3, s.end());for(int a : s){std::cout<< a <<" ";}}

      出力: 

      0 1 2 7 8 6 5 9 4 3

      [編集]参照

      コピーと部分的にソートする要素の範囲
      Original:
      copies and partially sorts a range of elements
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      (関数テンプレート)[edit]
      ソートされた範囲の要素を等しい要素間の順序を維持しながら
      Original:
      sorts a range of elements while preserving order between equal elements
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      (関数テンプレート)[edit]
      昇順にソートする範囲
      Original:
      sorts a range into ascending order
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      (関数テンプレート)[edit]
      「http://ja.cppreference.com/mwiki/index.php?title=cpp/algorithm/partial_sort&oldid=29129」から取得
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