Pat乙级1072所有检查点格式错误,求助

package not.die.in.here;
import java.io.*;
import java.util.*;
public class _1072_ThingsCheck {

public static void main(String[] args)throws IOException{
    BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
    String[] str = bf.readLine().split(" ");
    StringBuilder sb = new StringBuilder("");
    int n = Integer.parseInt(str[0]);//学生人数
    int m = Integer.parseInt(str[1]);//违禁物品个数
    String[] ban = bf.readLine().split(" ");
    List<String> banList = new ArrayList<String>();
    for(int i=0;i<m;i++) {
        banList.add(ban[i]);
    }
    int stuSum = 0;
    int banSum = 0;
    for(int i=0;i<n;i++) {
        String[] stus = bf.readLine().split(" ");
        sb.delete(0, sb.capacity());
        for(int j=2;j<stus.length;j++) {
            if(banList.contains(stus[j])) {
                stuSum++;//输出有违禁品的学生名字
                System.out.print(stus[0]+": ");
                break;
            }
        }
        for(int j=2;j<stus.length;j++) {
            if(banList.contains(stus[j])) {
                banSum++;
                sb.append(stus[j]+" ");//放进去最后再去空格
            }
        }
        System.out.println(sb.toString().trim());
    }
    System.out.println(stuSum+ " " +banSum);




}

}

https://blog.csdn.net/qikai121521/article/details/78013089