求大神解答。。我这个做法哪里没对 public static void main(String[] args) {         Scanner in = new Scanner(System.in);         while (in.hasNext()) {             int num = in.nextInt();             for (int i = 0; i < num; i++) {                 int k = in.nextInt();                 int m = in.nextInt();                 int max=30/(k+1);                 if (m == 0)                      System.out.println(max);                else {                     int result = m;                             List<Integer> a = new ArrayList<Integer>(m);                     for (int j = 0; j < m; j++) {                         a.add(in.nextInt());                     }                     if (k == 0)                         System.out.println(30);                     else {                         int teml=(a.get(0)-1)/(k+1);                         if(teml>=1)                           result=result+teml;                         int temr=(30-a.get(a.size()-1))/(k+1);                         if(temr>=1)                               result=result+temr;                             for(int r=0;r<a.size()-1;r++)                             {                                                int tem=(a.get(r+1)-a.get(r))/(k+1);                                if(tem>1)                                    result=result+tem-1；                                                                                                                                         }                         System.out.println(result);                     }                                      }             }         }     }