public static void main(String args[]) {
try {
System.setIn(new FileInputStream("vans.in"));
System.setOut(new PrintStream("vans.out"));
} catch (Throwable T_T) {
}
new vans().run();
}
private static void setStream(String in, String out) {
try {
System.setIn(new BufferedInputStream(new FileInputStream(in)));
System.setOut(new PrintStream(out));
} catch (Exception e) {
e.printStackTrace();
}
}