public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
MyReader reader = new MyReader(br);
MyPrinter printer = new MyPrinter();
Mice mice;
String str;
String output;
while ((str = br.readLine()) != null) {
int count = Integer.parseInt(str);
for (int i = 0; i < count; i++) {
int side = reader.getSide();
int[][] square = reader.getSquare(side);
mice = new Mice();
output = mice.getLongestDistance(square) + "";
if (i != count - 1) {
output += "\n";
}
out.println(output);
}
}
}
public void solve() throws IOException {
MyReader in = new MyReader();
PrintWriter out = new PrintWriter(System.out);
while (true) {
int n = in.nextInt();
if (n == 0) break;
int m = in.nextInt(), g = in.nextInt(), score[] = new int[m];
for (int i = 0; i < m; i++) score[i] = in.nextInt();
Student students[] = new Student[n];
for (int i = 0; i < n; i++) {
String name = in.next();
int cnt = in.nextInt(), totScore = 0;
for (int j = 0; j < cnt; j++) totScore += score[in.nextInt() - 1];
students[i] = new Student(name, totScore);
}
Arrays.sort(students);
int pass_cnt = 0;
for (; pass_cnt < n && students[pass_cnt].getScore() >= g; pass_cnt++) ;
out.println(pass_cnt);
for (int i = 0; i < pass_cnt; i++) students[i].print(out);
out.flush();
}
}
