java代码约瑟夫出圈 java 约瑟夫
java约瑟夫出圈问题
public class YueSeFuCircle
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{
public static void main(String[] args)
{
int n = 100;//总共多少人
int kill = 3;//要出圈的数字
int winner = 0;
for (int i = 2; i = n; i++)
{
winner = (winner + kill) % i;
System.out.println(winner);
}
System.out.println("Winner is:" + (winner + 1));
}
}
关于约瑟夫环问题，用java 编写程序，输出n个人出圈的顺序，书上的程序代码如下，但是有几点我搞不明白
你这个好麻烦啊， 理解 队列 和 桟 的区别
队伍 先进先出 FIFO
桟 先进后出 LIFO
本程序明显是队伍！！！
import java.util.* ;
public class T {
public static void main(String[] args) {
ListInteger list = new LinkedListInteger();
//模拟15个人，编号是1-15
for(int i=1 ; i=15 ; i++) {
list.add(i);
}
//模拟 叫到7的人出圈
show(list , 7);
}
public static void show(ListInteger list , int n){
int i = 1 ;//每次报的数字
int count = 1 ;//记录第几次出圈
while(true){
//当list长度为1的时候代表就剩下1个人
if(list.size()==1){
System.out.println("第"+count+++"次是"+list.get(0));
return ;
}
//每次获取队里第一个人
int value = list.get(0);
//报完数后移开该人
list.remove(0);
//如果报数的人报的数字为n ,则打印
if(i == n) {
i = 1 ;
System.out.println("第"+count+++"次是"+value);
}else {
//如果报数的人报的数字不是n ,将该人排到队伍的后面，以便下次继续叫号
list.add(value);
//产生下次报数的数字
i++ ;
}
}
}
}
用java解决约瑟夫问题
Java约瑟夫问题： n个人（不同id）围成一个圈，从startId(任意数)个开始报数m(任意数)个数，数m的人出列排成新队列，m清零，然后又从下一个人开始数m个数开始，数到m就出列接在新队列尾部，如此重复，知道所有人都出列为止。
package list;
import java.util.ArrayList;
* 打印 出列后的新队列
*
* eg
* int n = 10;//总人数
* int m = 3; //报数个数
* int startIndex = 1; //起点位置
* @author Hulk 2014 03 20
*
*/
public class JosephListTest {
public static void main(String[] args) {
long startTime = System.currentTimeMillis();
JosephListTest test = new JosephListTest();
int n = 10; //总人数
int m = 3; //报数个数
int startIndex = 12; //起点位置
System.out.println("JosephListTest: n= " + n + ", m= " + m +
", startIndex= " + startIndex + "\n\nQUEUE RESULT:");
ArrayListPerson queueList = test.queuePreson(n, m, startIndex);
for (Person person : queueList) {
System.out.println("OUT person: " + person);
}
System.out.println("use time= " +
(System.currentTimeMillis() - startTime));
}
private ArrayListPerson queuePreson(int n, int m, int startIndex) {
ArrayListPerson queueList = null;
PersonList list = createList(n);
//list.search();
if ((list != null) (list.head != null)) {
queueList = new ArrayListJosephListTest.Person();
PNode pNode = list.head;
if (startIndex 0) {
startIndex = startIndex % n;
pNode = list.getNode(startIndex);
} else {
pNode = list.head;
}
int count = 1;
while (list.size 0) {
Person outPerson = null;
//find
if (count == (m - 1)) {
//delete next node
Person prev = pNode.person;
outPerson = list.remove(prev);
queueList.add(outPerson);
//System.out.println("OUT person: " + outPerson + ", size= " + list.size);
count = 0;
}
pNode = pNode.next;
count++;
}
}
return queueList;
}
private PersonList createList(int n) {
PersonList list = new PersonList();
for (int i = 0; i n; i++) {
Person person = new Person(i, "name_" + (i + 1));
list.add(i, person);
}
return list;
}
public class PersonList {
PNode head = null;
int size = 0;
public PersonList() {
}
public PersonList(Person person) {
head = new PNode(person, head);
size++;
}
public PersonList(PNode head) {
this.head = head;
head.setNext(head);
size++;
}
public PNode getHead() {
return head;
}
public void setHead(PNode head) {
this.head = head;
}
public int getSize() {
return size;
}
public void setSize(int size) {
this.size = size;
}
public void size(int size) {
this.size = size;
}
public boolean isEmpty() {
return this.size = 0;
}
public void initHead(Person person) {
if (size == 0) {
head = new PNode(person, head);
} else {
PNode no = head;
head = new PNode(person, no);
}
size++;
}
public void add(int index, Person person) {
if (size == 0) {
head = new PNode(person, head);
head.setNext(head);
//System.out.println("head: " + head);
} else {
if (index 0) {
index = 0;
}
if (index size) {
index = size;
}
PNode no = head;
for (int i = 0; i (index - 1); i++) {
no = no.next;
}
PNode newNode = new PNode(person, no.next);
no.next = newNode;
}
size++;
}
public Person delete(int index) {
PNode pNode = remove(index);
if ((pNode != null) (pNode.next != null)) {
return pNode.next.person;
}
return null;
}
public PNode remove(int index) {
if (size == 0) {
return null;
} else {
if ((index 0) || (index = size)) {
return null;
}
}
PNode no = head;
for (int i = 0; i (index - 1); i++) {
no = no.next;
}
no.next = no.next.next;
size--;
if ((no != null) (no.next != null)) {
return no.next;
}
return null;
}
/**
* remove next node of person node, and return the deleted person
* @param prePerson
* @return removed Person
*/
public Person remove(Person prePerson) {
if (prePerson == null) {
return null;
}
if (size == 0) {
return null;
}
PNode preNode = head;
int index = -1;
for (int i = 0; i size; i++) {
if (preNode.person.id == prePerson.id) {
index = i;
break;
} else {
preNode = preNode.next;
}
}
Person remPerson = null;
if (size = 1) {
//only one node, get its person and set it as null
remPerson = preNode.person;
preNode = null;
} else {
//preNode.next.person is dest one
remPerson = preNode.next.person;
preNode.next = preNode.next.next;
}
size--;
//System.out.println("deleteing index= " + index + " : " + remPerson + ", size= " + size);
return remPerson;
}
public int update(Person src, Person dest) {
if (src == null) {
return -1;
}
int index = -1;
PNode no = head;
for (int i = 0; i size; i++) {
if (src.id == no.person.id) {
no.person = dest;
break;
} else {
no = no.next;
}
}
return index;
}
public boolean set(int index, Person person) {
if (person == null) {
return false;
}
if (size == 0) {
return false;
} else {
if ((index 0) || (index = size)) {
return false;
}
}
PNode no = head;
for (int i = 0; i index; i++) {
no = no.next;
}
no.person = person;
return true;
}
public Person get(int index) {
PNode no = getNode(index);
if (no != null) {
return no.person;
}
return null;
}
public PNode getNode(int index) {
if (size == 0) {
return null;
} else {
if ((index 0) || (index = size)) {
return null;
}
}
PNode no = head;
for (int i = 0; i index; i++) {
no = no.next;
}
return no;
}
public void search() {
int sizeLong = size;
PNode no = head;
for (int i = 0; i sizeLong; i++) {
System.out.println("search index= " + i + ", " + no);
no = no.next;
}
}
}
public class PNode {
Person person;
PNode next = null;
public PNode() {
}
public PNode(Person person) {
this.person = person;
}
public PNode(Person person, PNode next) {
this.person = person;
this.next = next;
}
@Override
public String toString() {
return "PNode [person=" + person.id + ", next=" + next.person.id +
"]";
}
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}
public PNode getNext() {
return next;
}
public void setNext(PNode next) {
this.next = next;
}
}
public class Person {
int id = 0;
String name = "";
public Person() {
}
public Person(int id, String name) {
super();
this.id = id;
this.name = name;
}
@Override
public String toString() {
return "Person [id=" + id + ", name=" + name + "]";
}
}
}
怎么用java数组实现约瑟夫环
用java数组实现约瑟夫环
package Josephround;
public class Joseround {
int sit;
int flagjo=0;
Joseround(){};
Joseround(int x){
sit=x;
}
void setflag(int x){
flagjo=x;
}
}
package Josephround;
public class Inijose {
Joseround jo[];
static int length=0;
Inijose(){};
Inijose(int x){
jo=new Joseround[x];
for(int i=0;ix;i++){
jo[i]=new Joseround(i+1);//创建对象数组
length++;
}
}
void delete(int n){
for(int i=n;ilength-1;i++){
jo[i]=jo[i+1];
}
length--;
}
}
package Josephround;
import java.util.Scanner;
public class Text {
public static void main(String[] args) {
int m,n;
System.out.println("input m");
Scanner m1=new Scanner(System.in);
m=m1.nextInt();
System.out.println("input n");
Scanner n1=new Scanner(System.in);
n=n1.nextInt();
int temp=0;
int x=0;
Inijose joseph=new Inijose(n);
while(joseph.length!=0){
for(int i=1;i=m;i++){
joseph.jo[x].setflag(i);
if(joseph.jo[x].flagjo==m){
System.out.println(joseph.jo[x].sit);
joseph.delete(x);
x--;
}
if(xjoseph.length-1) x++;
else x=0;
}
}
}
}
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