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leetcode 19 Remove Nth Node From End of List
class Solution { public: ListNode* removeNthFromEnd(ListNode* head, int n) { if (!head->next) return NULL; ListNode *pre = head, *cur = head; for (int i = 0; i < n; ++i) cur = cur->next; if (!cur) return head->next; while (cur->next) { cur = cur->next; pre = pre->next; } pre->next = pre->next->next; return head; } };
leetcode 19 Remove Nth Node From End of List
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