题解 | #数据分类处理#

import java.util.*;

public class Main{
    public static void main(String[] arg){
        Scanner sc=new Scanner(System.in);
        while(sc.hasNextLine()){
            String[] istr =sc.nextLine().split(" ");
//             int inum = Integer.parseInt(istr[0]);
            String[] iarr = new String[istr.length-1];
            for(int i =1;i<istr.length;i++){
                iarr[i-1] = istr[i];
            }

            String[] rstr =sc.nextLine().split(" ");
//             int rnum = Integer.parseInt(rstr[0]);
            String[] rarr = new String[rstr.length-1];
            for(int i =1;i<rstr.length;i++){
                rarr[i-1] = rstr[i];
            }
            Arrays.sort(rarr,new Comparator<String>(){
                @Override
                public int compare(String a, String b){
                    return Integer.parseInt(b)-Integer.parseInt(a);
                }
            });
            StringBuffer buffer = new StringBuffer();
            int tnum = 0;
            //为了R的去重
            List<String> list = new ArrayList<>();
            for(int i = rarr.length-1; i>=0;i--){
                if(list.contains(rarr[i])){
                    continue;
                }

                list.add(rarr[i]);
                StringBuffer subBuffer = new StringBuffer();
                int num=0;
                boolean flag = false;
                for(int j =0;j<iarr.length;j++){
                    if(iarr[j].contains(rarr[i])){
                        flag = true;
                        subBuffer.append(j+" ");
                        subBuffer.append(iarr[j]+" ");
                        num++;
                        tnum++;
                        tnum++;
                    }
                }
                if(flag){
                    buffer.append(rarr[i]+" ");
                    buffer.append(num+" ");
                    buffer.append(subBuffer);
                    tnum++;
                    tnum++;
                }
            }
//             System.out.println(buffer.toString());
            StringBuffer res = new StringBuffer();
            res.append(tnum+" ");
            res.append(buffer);
            System.out.println(res.toString());
        }
    }
}