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std::push_heap

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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)
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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
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Heap operations
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push_heap
pop_heap
sort_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 >
void push_heap( RandomIt first, RandomIt last );
(1)
template< class RandomIt, class Compare >

void push_heap( RandomIt first, RandomIt last,

                Compare comp );
(2)
挿入範囲last-1によって定義されたヒープに位置[first, last-1)にある要素。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:
Inserts the element at the position last-1 into the heap defined by the range [first, last-1). 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 -
変更するヒープを定義する要素の範囲
Original:
the range of elements defining the heap to modify
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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.
-
The type of dereferenced RandomIt 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

せいぜい 2×log(n)の比較どこN=std::distance(first, last).
Original:
At most 2×log(N) comparisons where N=std::distance(first, 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());
 
    std::cout << "v: ";
    for (auto i : v) std::cout << i << ' ';
    std::cout << '\n';
 
    v.push_back(6);
 
    std::cout << "before push_heap: ";
    for (auto i : v) std::cout << i << ' ';
    std::cout << '\n';
 
    std::push_heap(v.begin(), v.end());
 
    std::cout << "after push_heap: ";
    for (auto i : v) std::cout << i << ' ';
    std::cout << '\n';
}

Output:

v: 9 5 4 1 1 3 
before push_heap: 9 5 4 1 1 3 6 
after push_heap:  9 5 6 1 1 3 4

[編集] も参照してください

ヒープから最大要素を削除します
Original:
removes the largest element from a heap
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(関数テンプレート) [edit]