Hi, I've solved this problem in C++ but when trying it in Java   I can't avoid TL on test11. What should I do in order ot improve my IO operations. I use BufferedReader and PrintWriter. I can share my code if necessary

you can call print only one time;
and don`t use many concatenations

        StreamTokenizer in = new StreamTokenizer(new BufferedReader(
                new InputStreamReader(System.in)));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));

it will be enough.
Good luck~