public class Josephu {
public static void main(String[] args) {
Cyclink cyclink=new Cyclink();
cyclink.setLen(5);
cyclink.createLink();
//cyclink.show();
cyclink.setK(2);
cyclink.setM(2);
cyclink.play();
}
}
class Child{
int no;
Child nextChild=null;
Child(int no){
this.no=no;
}
}
class Cyclink{
//先定义指向链表对第一个小孩的引用
//指向第一个小孩的引用 不能动，所以需要定义游标
Child firstChild=null;
Child temp=null;
int len=0;//共有0个人入圈
int k=0;
int m=0;
public void play(){
Child temp=this.firstChild;
for(int i=1;i<k;i++){
temp=temp.nextChild;
}
while(len!=1){
for(int j=1;j<m;j++){
temp=temp.nextChild;
}
Child temp2=temp;
while(temp2.nextChild!=temp){
temp2=temp2.nextChild;
}
temp2.nextChild=temp.nextChild;
temp=temp.nextChild;
this.len--;
}
System.out.println(temp.no);
}
public void setK(int k){
this.k=k;
}
public void setM(int m){
this.m=m;
}
public void setLen(int len){
this.len=len;
}
public void createLink(){
for(int i=1;i<=len;i++){
if (i==1) {
//创建第一个小孩
Child ch=new Child(i);
firstChild = ch;
this.temp = ch;
}
else {
if(i==len){
Child ch=new Child(i);
temp.nextChild=ch;
temp=ch;
temp.nextChild=this.firstChild;
}
else{
Child ch = new Child(i);
temp.nextChild = ch;
temp = ch;
}
}
}
}
public void show(){
Child temp=this.firstChild;
do{
System.out.print(temp.no+" ");
temp=temp.nextChild;
}while(temp!=this.firstChild);
}
}