/**
* 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
* @param val int整型
* @return ListNode类
*/
ListNode* removeElements(ListNode* head, int val) {
ListNode* dummy = new ListNode(0);
dummy->next = head;
ListNode* cur = dummy;
while(cur->next != nullptr){
// 如果相同则删除相应的节点
if(cur->next->val == val){
ListNode* rm = cur->next;
cur->next = rm->next;
delete rm;
}else{
// 否则看下一个节点
cur = cur->next;
}
}
ListNode* newhead = dummy->next;
delete dummy;
return newhead;
}
};