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std::is_heap_until

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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
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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
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Set operations (on sorted ranges)
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ヒープ操作
Original:
Heap operations
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is_heap
is_heap_until(C++11)
make_heap
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 >
RandomIt is_heap_until( RandomIt first, RandomIt last );
(1) (C++11およびそれ以降)
template< class RandomIt, class Compare >
RandomIt is_heap_until( RandomIt first, RandomIt last, Compare comp );
(2) (C++11およびそれ以降)
レンジ[first, last)を調べて、ヒープ'ですfirstで最大範囲の始まりを見つけることができます。関数の最初のバージョンは要素を比較するoperator<使用し、2番目はcomp与えられた比較関数を使用しています.
Original:
Examines the range [first, last) and finds the largest range beginning at first which is heap. The first version of the function uses operator< to compare the elements, the second uses the given comparison function comp.
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目次

[編集] パラメータ

first, last -
検討する要素の範囲
Original:
the range of elements to examine
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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 RandomIt can be dereferenced and then implicitly converted to both of them. ​

Type requirements
-
RandomIt must meet the requirements of RandomAccessIterator.

[編集] 値を返します

'ヒープですfirstで最大範囲の先頭の上限。つまり、最後のイテレータitどの範囲の[first, it)です'ヒープ.
Original:
The upper bound of the largest range beginning at first which is heap. That is, the last iterator it for which range [first, it) is heap.
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[編集] 複雑

firstlastとの間の距離の線形
Original:
Linear in the distance between first and last
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[編集] ノート

'ヒープは、要素の範囲です[f,l)それは、次のプロパティがあります
Original:
A heap is a range of elements [f,l) that has the following properties:
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  • *f範囲内の最大要素である
    Original:
    *f is the largest element in the range
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  • 新しい要素がstd::push_heap()を使用して追加できます
    Original:
    a new element can be added using std::push_heap()
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  • 最初の要素はstd::pop_heap()を用いて除去することができる
    Original:
    the first element can be removed using std::pop_heap()
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要素の実際の配置は、実装定義です.
Original:
The actual arrangement of the elements is implementation defined.
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[編集]

#include <iostream>
#include <algorithm>
 
int main()
{
    std::vector<int> v { 3, 1, 4, 1, 5, 9 };
 
    std::make_heap(v.begin(), v.end());
 
    // probably mess up the heap
    v.push_back(2);
    v.push_back(6);
 
    auto heap_end = std::is_heap_until(v.begin(), v.end());
 
    std::cout << "all of v: ";
    for (auto i : v) std::cout << i << ' ';
    std::cout << '\n';
 
    std::cout << "only heap: ";
    for (auto i = v.begin(); i != heap_end; ++i) std::cout << *i << ' ';
    std::cout << '\n';
}

Output:

all of v:  9 5 4 1 1 3 2 6 
only heap: 9 5 4 1 1 3 2

[編集] も参照してください

checks if the given range is a heap
(関数テンプレート) [edit]