import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;
class main {

static long reverseBytesInLong(long l) {
  return reverseBytesInInt((int) (l >> 32)) & 0xFFFFFFFFL
    | ((long) reverseBytesInInt((int) l)) << 32;
}
static int reverseBytesInInt(int i) {
  return i << 24
    | (i & 0xFF00) << 8
    | (i & 0xFF0000) >> 8
    | (i >> 24) & 0xFF;
}

}