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b_heap.h
Package: leda.tar.gz [view]
Upload User: gzelex
Upload Date: 2007-01-07
Package Size: 707k
Code Size: 2k
Category:
Mathimatics-Numerical algorithms
Development Platform:
MultiPlatform
- /*******************************************************************************
- +
- + LEDA-R 3.2.3
- +
- + b_heap.h
- +
- + Copyright (c) 1995 by Max-Planck-Institut fuer Informatik
- + Im Stadtwald, 66123 Saarbruecken, Germany
- + All rights reserved.
- +
- *******************************************************************************/
- #ifndef LEDA_BHEAP_H
- #define LEDA_BHEAP_H
- //------------------------------------------------------------------------------
- // b_heap: bounded heaps with integer keys in [a..b]
- //------------------------------------------------------------------------------
- #include <LEDA/basic.h>
- #include <LEDA/list.h>
- #include <LEDA/array.h>
- class b_heap_node {
- friend class b_heap;
- friend void print_b_heap_item(b_heap_node*);
- int key;
- GenPtr info;
- list_item loc;
- b_heap_node(int k, GenPtr i )
- {
- key = k; info = i; loc = 0; }
- LEDA_MEMORY(b_heap_node)
- };
- typedef b_heap_node* b_heap_item;
- typedef list<b_heap_item>* b_heap_bucket;
- class b_heap {
- int min;
- int max;
- int low;
- int high;
- array<b_heap_bucket> T;
- public:
- b_heap(int a, int b);
- ~b_heap() { clear(); }
- b_heap_item insert(int key, GenPtr info) ;
- b_heap_item find_min();
- b_heap_item find_max();
- GenPtr del_min();
- GenPtr del_max();
- b_heap_item decrease_key(b_heap_item it, int k);
- b_heap_item increase_key(b_heap_item it, int k);
- void delete_item(b_heap_item it);
- void clear();
- GenPtr info(b_heap_item it) { return it->info; }
- int key(b_heap_item it) { return it->key; }
- int empty() { return (find_min()==0) ? true : false; }
- void print();
- };
- #endif