LeeCode-Insertion Sort List

Sort a linked list using insertion sort.

 

 1 /**
 2  * Definition for singly-linked list.
 3  * struct ListNode {
 4  *     int val;
 5  *     struct ListNode *next;
 6  * };
 7  */
 8 struct ListNode* insertionSortList(struct ListNode* head) 
 9 {
10     struct ListNode *p;
11     p=head;
12     int count=0;
13     while(p!=NULL)
14     {
15         count++;
16         p=p->next;
17     }
18 
19     int *array;
20     array=(int *)malloc(count*sizeof(int));
21 
22     p=head;
23     int i=0,j,k;
24     while(p!=NULL)
25     {
26         array[i]=p->val;
27         p=p->next;
28         i++;
29     }
30 
31     for(i=1;i<count;i++)
32     {
33         for(j=i-1;j>=0;j--)
34         {
35             if(array[j]<array[i])
36                 break;
37         }
38 
39         if(j!=i-1)
40         {
41             int tmp=array[i];
42             for(k=i-1;k>j;k--)
43             {
44                 array[k+1]=array[k];
45             }
46             array[k+1]=tmp;
47         }
48     }    
49 
50     i=0;
51     struct ListNode *q;
52     q=head;
53     while(q!=NULL)
54     {
55         q->val=array[i];
56         q=q->next;
57         i++;
58     }
59 
60 
61     return head;
62 }