数3退1的java实现

基础的java练习，数3退1，数组方式的实现。

public class Count3Quit {

    public static void main(String[] args){
        
        boolean[] arr = new boolean[500];
        int leftCount = arr.length;
        int count = 0;
        int index = 0;
        
        for(int i = 0;i < arr.length;i++){
            arr[i] = true;
        }
        
        while(leftCount > 1){
            
          index = index%arr.length;
          if(arr[index] == true){
            count++;
            
            if(count==3){
                count = 0;
                arr[index] = false;
                leftCount--;
            }
          }
            index++;
        } 

        for(int i = 0;i < arr.length;i++){
              if(arr[i]==true){
                  System.out.println(i);
              }
          }  
    }
}