1 #include <iostream> 2 #include <vector> 3 #include <queue> 4 using namespace std; 5 template <typename T> 6 class LeftlistNode 7 { 8 public: 9 T key; 10 int npl; 11 LeftlistNode* left; 12 LeftlistNode* right; 13 14 LeftlistNode(T& value, LeftlistNode* l = NULL, LeftlistNode* r = NULL, int n = 0): 15 key(value), left(l), right(r), npl(n){} 16 }; 17 18 template <typename T> 19 class LeftlistHeap{ 20 private: 21 LeftlistNode<T>* mRoot; 22 public: 23 LeftlistHeap(){} 24 LeftlistHeap(vector<T>& items){ 25 mRoot = buildHeap(items); 26 } 27 ~LeftlistHeap(){ 28 destory(mRoot); 29 } 30 void merge(LeftlistHeap<T>* other){ 31 if(this == other) 32 return; 33 mRoot = _merge(mRoot, other->mRoot); 34 } 35 void insert(T& key){ 36 mRoot = _merge(mRoot, new LeftlistNode<T>(key)); 37 } 38 void remove(){ 39 LeftlistNode<T> old = mRoot; 40 mRoot = _merge(mRoot->Left, mRoot->right); 41 delete old; 42 } 43 T get_min(){ 44 return mRoot->key; 45 } 46 47 void destory(LeftlistNode<T>* & mRoot){ 48 if(mRoot == NULL) 49 return; 50 if(mRoot->left != NULL) 51 destory(mRoot->left); 52 if(mRoot->right != NULL) 53 destory(mRoot->right); 54 delete mRoot; 55 } 56 57 private: 58 LeftlistNode<T>* _merge1(LeftlistNode<T>* x, LeftlistNode<T>* y){ 59 if(x == NULL) 60 return y; 61 if(y == NULL) 62 return x; 63 if(x->key < y->key) 64 _merge2(x, y); 65 else 66 _merge2(y, x); 67 } 68 LeftlistNode<T>* _merge2(LeftlistNode<T>* x, LeftlistNode<T>* y){ 69 if(x->left == NULL) 70 x->left = y; 71 else{ 72 x->right = _merge1(x->right, y); 73 if(x->left->npl < x->right->npl){ 74 LeftlistNode<T>* temp = x->left; 75 x->left = x->right; 76 x->right = temp; 77 } 78 x->npl = x->right->npl + 1; 79 } 80 return x; 81 } 82 83 LeftlistNode<T>* _merge(LeftlistNode<T>* x, LeftlistNode<T>* y){ 84 if(x == NULL && y == NULL) 85 return NULL; 86 else if(x == NULL && y != NULL) 87 return y; 88 else if(y == NULL && x != NULL) 89 return x; 90 else{ 91 if(x->key > y->key){ 92 LeftlistNode<T>* tmp = x; 93 x = y; 94 y = tmp; 95 } 96 if(x->left == NULL) 97 x->left = y; 98 else{ 99 x->right = _merge(x->right, y); 100 if(x->left->npl < x->right->npl){ 101 LeftlistNode<T>* tmp = x->left; 102 x->left = x->right; 103 x->right = tmp; 104 } 105 x->npl = x->right->npl + 1; 106 } 107 } 108 return x; 109 } 110 LeftlistNode<T>* buildHeap(vector<T>& items){ 111 queue<LeftlistNode<T>*> tmp_queue; 112 for(int i = 0; i < items.size(); ++i) 113 tmp_queue.push(new LeftlistNode<T>(items[i])); 114 while(tmp_queue.size() > 1){ 115 LeftlistNode<T>* t1 = tmp_queue.front(); 116 tmp_queue.pop(); 117 LeftlistNode<T>* t2 = tmp_queue.front(); 118 tmp_queue.pop(); 119 tmp_queue.push(_merge1(t1, t2)); 120 } 121 return tmp_queue.front(); 122 } 123 124 }; 125 126 int main(){ 127 int a[]= {100,40,24,30,36,20,12,16}; 128 vector<int> lt(a, a + 7); 129 LeftlistHeap<int> yj(lt); 130 cout << yj.get_min() << endl; 131 return 0; 132 }
原文地址:https://www.cnblogs.com/kHrystal/p/9490924.html
时间: 2024-10-31 03:45:52