50个人围成一圈数到3和3的倍数时出圈，问剩下的人是谁？在原来的位置是多少

public class T1{public T1() {// TODO Auto-generated constructor stub}public static void main(String[] args) {// TODO Auto-generated method stubint peoplenum =50 ;boolean[] p = new boolean[peoplenum];int num = 1;int count = 0;for(int i=0;i<50;i++){p[i]=true;}while(peoplenum>1 ){if(count==50){count=0;}if( p[count]==true ){if(num %3 ==0 ){p[count]=false;peoplenum--;}num++;}count++;} //end whilefor(int i=0;i<50;i++){if(p[i]==true){System.out.println(i+1);}}}}