删除一个链表第k个节点。

import java.util.Scanner;

public class KNode {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        ListNode head = new ListNode(sc.nextInt());
        ListNode cur = head;
        for (int i = 1; i < n; ++i) {
            cur.next = new ListNode(sc.nextInt());
            cur = cur.next;
        }
        ListNode help = new ListNode(-1);
        help.next = head;
        cur = help;
        ListNode next = head;
        for (int i = 0; i < m - 1; ++i) {
            cur = cur.next;
        }
        cur.next = cur.next.next;
        StringBuilder sb = new StringBuilder();
        cur = help.next;
        while (cur != null) {
            sb.append(cur.val + "").append(" ");
            cur = cur.next;
        }
        System.out.println(sb.toString());
    }
}

class ListNode {
    int val;
    ListNode next;
    ListNode(int val) {
        this.val = val;
    }
}