1 ListNode *reverseKGroup(ListNode *head, int k) {
2 // Start typing your C/C++ solution below
3 // DO NOT write int main() function
4 if( k<= 1 || head == NULL) return head;
5
6 ListNode * root = new ListNode( -1 );
7 root->next = head;
8 ListNode* ptr1 = root;
9 ListNode* ptr2 ;
10 ListNode* tmp, *tmp2,*tmp3;
11
12 int count = 1;
13 while( head != NULL )
14 {
15 if( count < k ) {
16 head = head -> next ;
17 count ++;
18 continue;
19 }
20 tmp = head->next;
21
22 head = ptr1 -> next;
23 ptr2 = head->next;
24 for( int i=1;i<k;i++)
25 {
26 head -> next = ptr2-> next;
27 ptr2->next = ptr1 -> next;
28 ptr1 -> next = ptr2;
29
30 ptr2 = head->next;
31
32 }
33 ptr1 = head;
34 head = tmp;
35 count = 1;
36 }
37 return root->next;
38 }
原文链接: https://www.cnblogs.com/jumpinGGrass/p/3170099.html
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