[LeetCode] 708. Insert into a Cyclic Sorted List

qpwoeiru96 發布于2019-08-16 13:50 / 1962人閱讀

Problem

Given a node from a cyclic linked list which is sorted in ascending order, write a function to insert a value into the list such that it remains a cyclic sorted list. The given node can be a reference to any single node in the list, and may not be necessarily the smallest value in the cyclic list.

If there are multiple suitable places for insertion, you may choose any place to insert the new value. After the insertion, the cyclic list should remain sorted.

If the list is empty (i.e., given node is null), you should create a new single cyclic list and return the reference to that single node. Otherwise, you should return the original given node.

The following example may help you understand the problem better:

In the figure above, there is a cyclic sorted list of three elements. You are given a reference to the node with value 3, and we need to insert 2 into the list.

The new node should insert between node 1 and node 3. After the insertion, the list should look like this, and we should still return node 3.

Solution

/*
// Definition for a Node.
class Node {
    public int val;
    public Node next;

    public Node() {}

    public Node(int _val,Node _next) {
        val = _val;
        next = _next;
    }
};
*/
class Solution {
    public Node insert(Node head, int insertVal) {
        if (head == null) {
            head = new Node();
            head.val = insertVal;
            head.next = head;
            return head;
        }
        Node next = head.next, pre = head;
        while (next != head) {
            //insert in flat or rising range
            if (pre.val == insertVal || (pre.val < insertVal && insertVal < next.val)) {
                Node cur = new Node(insertVal, next);
                pre.next = cur;
                return head;
            }
            //insert in peak and falling range
            if (pre.val > next.val && (insertVal < next.val || insertVal > pre.val)) {
                Node cur = new Node(insertVal, next);
                pre.next = cur;
                return head;
            }
            
            pre = next;
            next = next.next;
        }
        //insert before head
        Node cur = new Node(insertVal, next);
        pre.next = cur;

        return head;
    }
}

云服務器 GPU云服務器 insert_into_select Cyclic v708 Sorted

文章版權歸作者所有，未經允許請勿轉載,若此文章存在違規行為，您可以聯系管理員刪除。

轉載請注明本文地址：http://specialneedsforspecialkids.com/yun/72404.html

[LintCode] Insert into a Cyclic Sorted List

Problem Given a node from a cyclic linked list which has been sorted, write a function to insert a value into the list such that it remains a cyclic sorted list. The given node can be any single node ...

Acceml 2019-08-15 13:27 評論0 收藏0
[LeetCode] 23. Merge k Sorted Lists

摘要：思路這題中的中，個還有其中個別的等于的情況，所以要判斷一下再加入代碼 Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Heap Time Complexity: Update the heap costs O(nklogk) Space ...

Codeing_ls 2019-08-15 12:25 評論0 收藏0
leetcode--57--Insert Interval

摘要：問題描述分析這道題的關鍵在于理解問題，抽取原型，理解中間可以部分如何界定，以及非部分如何進行追加。需要注意的是循環到最后一個元素和在最后一個元素的區別。問題描述： Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary). You m...

kycool 2019-07-31 11:04 評論0 收藏0
[LeetCode] Insert Interval

Problem Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary). You may assume that the intervals were initially sorted according to their start times....

Jonathan Shieber 2019-08-19 11:08 評論0 收藏0
leetcode57. Insert Interval

摘要：題目要求給定一組順序排列且相互之間沒有重疊的區間，輸入一個區間，將它插入到當前的區間數組中，并且將需要合并的區間合并，之后返回插入并且合并后的區間。我們將這三個類型的區間分別標注為類型，類型，類型。題目要求 Given a set of non-overlapping intervals, insert a new interval into the intervals (merge...

Yuanf 2019-08-16 10:37 評論0 收藏0