请给出一个时间为O(nlgk)、用来将k个已排序链表的算法。此处n为所有输入链表中元素的总数。...

代码：

#include "iostream"
#define null 0
using namespace std;

typedef struct node{
    int data;
    struct node *next;
}Link;

int heap_size=3;

Link* createLink(){
    int data;
    Link *t,*h=null,*p;
    cin>>data;
    int i=0;
    while(data!=0){
        p=(Link*)malloc(sizeof(Link));
        p->data=data;
        p->next=null;
        i++;
        if(i==1)
            h=t=p;
        else {
            t->next=p;
            t=t->next;
        }
        cin>>data;
    }
    return h;
}

int left(int i){
    return 2*i;
}

int right(int i){
    return 2*i+1;
}

void min_Heapify(Link* A[],int i){
    int l,r;
    l=left(i);
    r=right(i);
    int smallest;
    if(l<=heap_size&&A[i]->data>A[l]->data)
        smallest=l;
    else 
        smallest=i;
    if(r<=heap_size&&A[smallest]->data>A[r]->data)
        smallest=r;
    if(smallest!=i){
        Link *temp;
        temp=A[i];
        A[i]=A[smallest];
        A[smallest]=temp;
        min_Heapify(A,smallest);
    }
}

Link *extract_MinHeap(Link*A[]){
    Link* min;
    min=A[1];
    A[1]=A[1]->next;
    if(A[1]==null){
        A[1]=A[heap_size];
        heap_size--;
    }
    min_Heapify(A,1);
    return min;
}

void build_Minheap(Link*A[]){
    heap_size=3;
    for(int i=heap_size/2;i>=1;i--)
        min_Heapify(A,i);
}

Link* mergeSort(Link*A[]){
    Link *T,*n;
    T=(Link*)malloc(sizeof(Link));
    T->next=null;
    n=T;
    Link *p;
    build_Minheap(A);
    while(heap_size!=1){
        p=extract_MinHeap(A);
        p->next=null;
        n->next=p;
        n=n->next;
    }
    n->next=A[1];
    return T;
}

void display(Link *h){
    Link*p=h;
    while(p!=null){
        cout<data<<" ";
        p=p->next;
    }
    cout<<endl;
}

void display1(Link *h){
    Link*p=h->next;
    while(p!=null){
        cout<data<<" ";
        p=p->next;
    }
    cout<<endl;
}

void main(){
    Link* A[4];
    int i;
    for(i=1;i<4;i++)
        A[i]=createLink();

    for(i=1;i<4;i++)
        display(A[i]);
    Link* T=mergeSort(A);
    display1(T);
    getchar();
    getchar();
}

 

转载于:https://www.cnblogs.com/593213556wuyubao/archive/2012/12/23/2830293.html