LintCode_452_删除链表中的元素

问题描述

样例

求解

class Solution {
public:
/**
* @param head a ListNode
* @param val an integer
* @return a ListNode
*/
ListNode *removeElements(ListNode *head, int val) {
ListNode dummy{0};
dummy.next = head;
auto prev = &dummy, curr = dummy.next;

while (curr) {
if (curr->val == val) {
prev->next = curr->next;
delete curr;
} else {
prev = curr;
}
curr = curr->next;
}
return dummy.next;
}
};