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);
}
}
}
