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 java.util.function.*;
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 java.awt.geom.*;
import javax.imageio.*;
import java.math.*;
import java.time.Duration;
import java.lang.invoke.VarHandle;
import java.lang.invoke.MethodHandles;
// use sub-array of array2, fixed length of array1 = 1024 bits
class main {

static int countDifferingBits_1024bit(long[] array1, long[] array2, int i1) {
  int diff = 0;
  for (int i = 0; i < 1024/64; i++)
    diff += popCount(array1[i]^array2[i1+i]);
  return diff;
}
static int popCount(int i) {
  return Integer.bitCount(i);
}

static int popCount(long l) {
  return Long.bitCount(l);
}



}