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std::inplace_merge

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< cpp‎ | algorithm

 
 
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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merge
inplace_merge
includes
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 BidirIt >
void inplace_merge( BidirIt first, BidirIt middle, BidirIt last );
(1)
template< class BidirIt, class Compare>
void inplace_merge( BidirIt first, BidirIt middle, BidirIt last, Compare comp );
(2)
[first, middle)[middle, last)1ソート範囲[first, last)に2つの連続した​​並べ替えの範囲をマージします。等しい要素の順序は保持されることが保証されている。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:
Merges two consecutive sorted ranges [first, middle) and [middle, last) into one sorted range [first, last). The order of equal elements is guaranteed to be preserved. 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 -
最初にソート範囲の先頭
Original:
the beginning of the first sorted range
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middle -
最初にソート範囲と第2の始まりの終わり
Original:
the end of the first sorted range and the beginning of the second
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last -
第二ソート範囲の終わり
Original:
the end of the second sorted range
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comp - comparison function which returns ​true if the first argument is less than the second.

The signature of the comparison function should be equivalent to the following:

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

The signature does not need to have const &, but the function must not modify the objects passed to it.
The types Type1 and Type2 must be such that an object of type BidirIt can be dereferenced and then implicitly converted to both of them. ​

Type requirements
-
BidirIt must meet the requirements of ValueSwappable and BidirectionalIterator.
-
The type of dereferenced BidirIt must meet the requirements of MoveAssignable and MoveConstructible.

[編集] 値を返します

(なし)
Original:
(none)
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[編集] 複雑

まさにN-1比較に十分な追加メモリが使用可能であれば、そうでなければN·log(N)どこN = std::distance(first, last).
Original:
Exactly N-1 comparisons if enough additional memory is available, otherwise N·log(N) where N = std::distance(first, last).
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[編集] ノート

この関数は、一般的にstd::get_temporary_bufferを呼び出すことによって、一時的なバッファを割り当てようとします。割り当てが失敗した場合は、あまり効率的なアルゴリズムが選ばれ.
Original:
This function attempts to allocate a temporary buffer, typically by calling std::get_temporary_buffer. If the allocation fails, the less efficient algorithm is chosen.
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[編集]

次のコードはマージソートを実装したものです.
Original:
The following code is an implementation of merge sort.
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#include <vector>
#include <iostream>
#include <algorithm>
 
template<class Iter>
void merge_sort(Iter first, Iter last)
{
    if (last - first > 1) {
        Iter middle = first + (last - first) / 2;
        merge_sort(first, middle);
        merge_sort(middle, last);
        std::inplace_merge(first, middle, last);
    }
}
 
int main()
{
    std::vector<int> v{8, 2, -2, 0, 11, 11, 1, 7, 3};
    merge_sort(v.begin(), v.end());
    for(auto n : v) {
        std::cout << n << ' ';
    }
    std::cout << '\n';
}

Output:

-2 0 1 2 3 7 8 11 11

[編集] も参照してください

2つのソートされた範囲をマージします
Original:
merges two sorted ranges
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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]
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]