第二题 //删除链表中值为3的倍数的结点 //{2,3,1,5,4,6,3} //{2,1,5,4} /** * struct ListNode { * int val; * struct ListNode *next; * ListNode(int x) : val(x), next(nullptr) {} * }; */ class Solution { public: /** * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可 * * * @param head ListNode类 * @return ListNode类 */ ListNode* deleteMultipleOf3(ListNode* head) { // write code here ListNode root(0); root.next = head; ListNode *p = head, *pre = &;root; while(p){ if(p ->val%3 == 0){ pre ->next = p ->next; delete p; p = pre ->next; } else{ p = p ->next; pre = pre ->next; } } return root.next; } };