leet-code/LeetCode/src/main/java/leetcode/editor/cn/FuZaLianBiaoDeFuZhiLcof.java

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2021-03-20 15:04:11 +08:00
//请实现 copyRandomList 函数,复制一个复杂链表。在复杂链表中,每个节点除了有一个 next 指针指向下一个节点,还有一个 random 指针指
//向链表中的任意节点或者 null。
//
//
//
// 示例 1
//
//
//
// 输入head = [[7,null],[13,0],[11,4],[10,2],[1,0]]
//输出:[[7,null],[13,0],[11,4],[10,2],[1,0]]
//
//
// 示例 2
//
//
//
// 输入head = [[1,1],[2,1]]
//输出:[[1,1],[2,1]]
//
//
// 示例 3
//
//
//
// 输入head = [[3,null],[3,0],[3,null]]
//输出:[[3,null],[3,0],[3,null]]
//
//
// 示例 4
//
// 输入head = []
//输出:[]
//解释:给定的链表为空(空指针),因此返回 null。
//
//
//
//
// 提示:
//
//
// -10000 <= Node.val <= 10000
// Node.random 为空null或指向链表中的节点。
// 节点数目不超过 1000 。
//
//
//
//
// 注意:本题与主站 138 题相同https://leetcode-cn.com/problems/copy-list-with-random-point
//er/
//
//
// Related Topics 链表
// 👍 168 👎 0
package leetcode.editor.cn;
import com.code.leet.entiy.Node;
import java.util.Arrays;
import java.util.List;
//剑指 Offer 35:复杂链表的复制
public class FuZaLianBiaoDeFuZhiLcof {
public static void main(String[] args) {
//测试代码
Solution solution = new FuZaLianBiaoDeFuZhiLcof().new Solution();
List<Integer> var = Arrays.asList(7, 13, 11, 10, 1);
List<Integer> random = Arrays.asList(null, 0, 4, 2, 0);
Node head = new Node(0);
// head = head.setHead(var, random);
2021-03-20 15:04:11 +08:00
solution.copyRandomList(head);
}
//力扣代码
//leetcode submit region begin(Prohibit modification and deletion)
/*
// Definition for a Node.
class Node {
int val;
Node next;
Node random;
public Node(int val) {
this.val = val;
this.next = null;
this.random = null;
}
}
*/
class Solution {
public Node copyRandomList(Node head) {
if (head == null) {
return null;
}
Node clone = head;
while (clone != null) {
Node temp = new Node(clone.val);
temp.next = clone.next;
clone.next = temp;
clone = temp.next;
}
clone = head;
while (clone != null) {
if (clone.random != null) {
clone.next.random = clone.random.next;
}
clone = clone.next.next;
}
clone = head.next;
Node temp = head;
Node newHead = clone;
while (temp != null && newHead != null) {
if (temp.next.next != null) {
temp.next = temp.next.next;
newHead.next = newHead.next.next;
} else {
temp.next = null;
}
temp = temp.next;
newHead = newHead.next;
}
return clone;
}
}
//leetcode submit region end(Prohibit modification and deletion)
}