package test;

public class Compare {

    public static void main(String[] args) {

    boolean[] array=new boolean[];

    for(int i=;i<array.length;i++) {

        array[i]=true;

    }

    int leftcount = ;

    int countnum = ;

    int index = ;

    while(leftcount > ) {

        if(array[index]) {

         countnum ++;

            if(countnum == ) {

            countnum = ;

            array[index] = false;

            leftcount--;

            }

        }

        index ++;

        if(index == ) {

            index = ;

        }

    }

     for(int i=;i<array.length;i++) {

        if(array[i]) {

        System.out.println(i);

        }

     }

     }

}

package test;

public class Studentcircle {

  public static void main(String[] args) {

      makecircle b=new makecircle();

      int countnum=;

      student m=b.first;

      while(b.count>) {

         countnum++;

         if(countnum==) {

             countnum=;

             b.delete(m);

         }

         m=m.right;

      }

      System.out.println(b.first.id);

  }

}

class student{

   int id;

   student left;

   student right;

}

class makecircle{

    int count=;

    student first,last;

    makecircle(int n){

     for(int i=;i<n;i++) {

        add();

     }

    }

    void add() {

      student x= new student();

      x.id=count;

      if(count<=) {

         first=x;

         last=x;

         x.left=x;

         x.right=x;

      }else {

         last.right=x;

         x.left=last;

         x.right=first;

         first.left=x;

         last=x;

       }

      count++;

    }

    void delete(student x) {

        if(count<=) {

        return;

        }else if(count==) {

            first=last=null;

         }else {

            x.left.right=x.right;

            x.right.left=x.left;

          if(x==first) {

             first=x.right;

          }else if(x==last) {

              last=x.left;

          }

         }

        count --;

    }

}