Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then left-out nodes in the end should remain as it is. You may not alter the values in the nodes, only nod…

Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then left-out nodes in the end should remain as it is. You may not alter the values in the nodes, only nod…

问题描述:1->2->3->4,假设k=2进行反转,得到2->1->4->3:k=3进行反转,得到3->2->1->4 算法思想:基本操作就是链表反转,将k个元素当作滑动窗口,依次进行反转. public class ReverseNodesInKGroup { public ListNode reverseKGroup(ListNode head, int k) { if (k == 1 || head == null || head.next ==…

package com.xiaowu.demo; /** * 给一个不多于5位的正整数,要求:①求它是几位数:②逆序打印出各位数字. * * * @author WQ * */ public class Demo23 { public static void main(String[] args) { f(123789); } public static void f(long l) { String s = Long.toString(l); char[] c = s.toCharArray(…

变相的字符串匹配 给定一个字符串,然后再给定一组同样长度的单词列表,要求在字符串中查找满足下面条件的起始位置: 1)从这个位置開始包括单词列表中全部的单词.且每一个单词仅且必须出现一次. 2)在出现的过程中不能出现其它的干扰单词. 3)出现的位置可能有多个. 4)单词的出现顺序不做要求. 以下是一个样例: S:"barfoothefoobarman" L:"foo","bar" 位置0是出现位置,.两个单词均出现仅出现一次,且没有干扰. 相同位置…

k近邻算法C++二维实现 这是一个k近邻算法的二维实现(即K=2的情况). #include <cstdio> #include <cstring> #include <iostream> #include <algorithm> #include <vector> #include <queue> #include <cmath> using namespace std; const double inf = 1000.…

题目: Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then left-out nodes in the end should remain as it is. You may not alter the values in the nodes, only…

题目:Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then left-out nodes in the end should remain as it is. You may not alter the values in the nodes, only…

问题: Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then left-out nodes in the end should remain as it is. You may not alter the values in the nodes, only…

Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then left-out nodes in the end should remain as it is. You may not alter the values in the nodes, only nod…