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.*;
class main {
static AutoCloseable tempUsePredictableRandomizer() {
return tempSetRandomSeed(0);
}
static AutoCloseable tempSetRandomSeed(int seed) {
return tempSetCustomRandomizerForThisThread(new Random(seed));
}
static AutoCloseable tempSetCustomRandomizerForThisThread(Random random) {
return tempSetTL(customRandomizerForThisThread_tl(), random);
}
static AutoCloseable tempSetTL(ThreadLocal tl, A a) {
return tempSetThreadLocal(tl, a);
}
static ThreadLocal customRandomizerForThisThread_tl = new ThreadLocal();
static ThreadLocal customRandomizerForThisThread_tl() {
return customRandomizerForThisThread_tl;
}
static AutoCloseable tempSetThreadLocal(final ThreadLocal tl, A a) {
if (tl == null) return null;
final A prev = setThreadLocal(tl, a);
return new AutoCloseable() { public String toString() { return "tl.set(prev);"; } public void close() throws Exception { tl.set(prev); }};
}
static AutoCloseable tempSetThreadLocalIfNecessary(ThreadLocal tl, A a) {
if (tl == null) return null;
A prev = tl.get();
if (eq(prev, a)) return null;
tl.set(a);
return new AutoCloseable() { public String toString() { return "tl.set(prev);"; } public void close() throws Exception { tl.set(prev); }};
}
static A setThreadLocal(ThreadLocal tl, A value) {
if (tl == null) return null;
A old = tl.get();
tl.set(value);
return old;
}
static boolean eq(Object a, Object b) {
return a == b || a != null && b != null && a.equals(b);
}
static String str(Object o) {
return o == null ? "null" : o.toString();
}
static String str(char[] c) {
return new String(c);
}
static String str(char[] c, int offset, int count) {
return new String(c, offset, count);
}
}