std::push_heap

 

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Definido en la cabecera <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)

Inserta el elemento en la posición last-1 en el montón definido por la [first, last-1) rango. La primera versión de la función utiliza operator< para comparar los elementos, el segundo utiliza la función de comparación dado comp .

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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Parámetros

first, last	-	la gama de elementos que definen el montón de modificar Original: the range of elements defining the 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	-	comparison function object (i.e. an object that satisfies the requirements of Compare) 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); While the signature does not need to have const &, the function must not modify the objects passed to it and must be able to accept all values of type (possibly const) Type1 and Type2 regardless of value category (thus, Type1 & is not allowed, nor is Type1 unless for Type1 a move is equivalent to a copy (desde C++11)). 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. ​
Requerimientos de tipo
- RandomIt debe reunir los requerimientos de RandomAccessIterator.
- The type of dereferenced RandomIt must meet the requirements of MoveAssignable and MoveConstructible.

Valor de retorno

(Ninguno)

Original:

(none)

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Complejidad

A lo sumo 2 × log (N) comparaciones N=std::distance(first, last) donde .

Original:

At most 2×log(N) comparisons where N=std::distance(first, last).

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Notas

Un montón' es una serie de elementos [f,l) que tiene las siguientes propiedades:

Original:

A heap is a range of elements [f,l) that has the following properties:

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• *f es el elemento más grande en el intervalo

  Original:

  *f is the largest element in the range

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• un elemento nuevo puede añadirse utilizando std::push_heap()

  Original:

  a new element can be added using std::push_heap()

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• el primer elemento se puede eliminar con std::pop_heap()

  Original:

  the first element can be removed using std::pop_heap()

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La disposición real de los elementos depende de la implementación .

Original:

The actual arrangement of the elements is implementation defined.

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Ejemplo

#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';
}

Salida:

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

Ver también

pop_heap

elimina el elemento más grande de un montón Original: removes the largest element from a heap The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (plantilla de función)