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 static x30_pkg.x30_util.DynamicObject;
import java.text.*;
import java.text.NumberFormat;
import java.util.TimeZone;
import java.awt.geom.*;
class main {
static class OKOrError implements IF0 {
A value;
final public Throwable getError(){ return error(); }
public Throwable error() { return error; }
Throwable error;
OKOrError() {}
OKOrError(A value) {
this.value = value;}
OKOrError(boolean dummy, Throwable error) {
this.error = error; assertNotNull(error); }
final boolean isOK(){ return ok(); }
boolean ok() { return error == null; }
public String toString() {
return ok()
? /*"OK: " +*/ str(value)
: "Error: " + str(error);
}
public A get() { return !ok() ? null : value; }
public A getMandatory() { if (!ok()) throw rethrow(error); return value; }
static OKOrError ok(A a) { return new OKOrError(a); }
static OKOrError error(Throwable error) { return new OKOrError(false, error); }
void setValue(A value) {
this.value = value;
error = null;
}
void setError(Throwable error) {
this.value = null;
this.error = error;
}
void copyFrom(OKOrError x) {
value = x.value;
error = x.error;
}
}
static RuntimeException error() {
throw new RuntimeException("fail");
}
static RuntimeException error(String msg) {
throw new RuntimeException(msg);
}
static A assertNotNull(A a) {
assertTrue(a != null);
return a;
}
static A assertNotNull(String msg, A a) {
assertTrue(msg, a != null);
return a;
}
static String ok(Object o) {
return format("ok *", o);
}
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);
}
static RuntimeException rethrow(Throwable t) {
if (t instanceof Error)
_handleError((Error) t);
throw t instanceof RuntimeException ? (RuntimeException) t : new RuntimeException(t);
}
static RuntimeException rethrow(String msg, Throwable t) {
throw new RuntimeException(msg, t);
}
static void assertTrue(Object o) {
if (!(eq(o, true) /*|| isTrue(pcallF(o))*/))
throw fail(str(o));
}
static boolean assertTrue(String msg, boolean b) {
if (!b)
throw fail(msg);
return b;
}
static boolean assertTrue(boolean b) {
if (!b)
throw fail("oops");
return b;
}
static volatile StringBuffer local_log = new StringBuffer(); // not redirected
static boolean printAlsoToSystemOut = true;
static volatile Appendable print_log = local_log; // might be redirected, e.g. to main bot
// in bytes - will cut to half that
static volatile int print_log_max = 1024*1024;
static volatile int local_log_max = 100*1024;
static boolean print_silent = false; // total mute if set
static Object print_byThread_lock = new Object();
static volatile ThreadLocal