Sorry for my bad English.
I use

    int ch;
    while ((ch = System.in.read()) != -1) {
        // my solution
        System.out.print(<some char>);
    }
    System.out.println();

But I get WA #1 with or without last code line. I also used System.out.flush (without last line), but it do not help me.

Use Scanner from utils,that's better and esier , than use System.in.read()