/**
 * struct ListNode {
 *    int val;
 *    struct ListNode *next;
 * };
 */

/**
 * 
 * @param head ListNode类 the head node
 * @return ListNode类
 */
struct ListNode* sortInList(struct ListNode* head ) {
    // write code here
    struct ListNode *p1 ,*p2,*p3;
    int b;

    for(p1=head;p1!=NULL;p1=p1->next)
        for(p2=p1;p2!=NULL;p2=p2->next)
        {if(p1->val>p2->val){
            b=p2->val;
            p2->val=p1->val;
            p1->val=b;}
        }
    return head;

}