std::pop_heap
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ヘッダ <algorithm> で定義 | ||
template<class RandomIt > void pop_heap( RandomIt first, RandomIt last ); | (1) | |
template<class RandomIt, class Compare > void pop_heap( RandomIt first, RandomIt last, Compare comp ); | (2) | |
スワップポジション
first
の値と位置last-1
の値とヒープにサブレンジ[first, last-1)
になります。これは、範囲[first, last)
によって定義されたヒープから最初の(最大の)要素を除去する効果を持っている.Original:
Swaps the value in the position
first
and the value in the position last-1
and makes the subrange [first, last-1)
into a heap. This has the effect of removing the first (largest) element from the heap defined by the range [first, last)
.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
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:
The first version of the function uses operator< to compare the elements, the second uses the given comparison function
comp
.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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目次 |
[編集]パラメータ
first, last | - | 変更するには、有効な空のヒープを定義する要素の範囲 Original: the range of elements defining the valid nonempty heap to modify The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
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 |
型の要件 | ||
-RandomIt は ValueSwappable および RandomAccessIterator の要件を満たさなければなりません。 | ||
-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
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:The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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- *f範囲内の最大要素であるOriginal:*f is the largest element in the rangeThe text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - 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()The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - 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()The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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]例
Run this code
#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'; std::pop_heap(v.begin(), v.end());// moves the largest to the end std::cout<<"after pop_heap: ";for(auto i : v)std::cout<< i <<' ';std::cout<<'\n'; int largest = v.back(); v.pop_back();// actually removes the largest elementstd::cout<<"largest element: "<< largest <<'\n'; std::cout<<"heap without largest: ";for(auto i : v)std::cout<< i <<' ';std::cout<<'\n';}
出力:
v: 9 5 4 1 1 3 after pop_heap: 5 3 4 1 1 9 largest element: 9 heap without largest: 5 3 4 1 1
[編集]参照
最大ヒープに要素を追加します (関数テンプレート) |