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.*;
// returns -1 when not available
class main {

static long currentThreadTotalCPUNanos() {
  return threadMXBean().getCurrentThreadCpuTime();
}
static ThreadMXBean threadMXBean_cache;
static ThreadMXBean threadMXBean() { if (threadMXBean_cache == null) threadMXBean_cache = threadMXBean_load(); return threadMXBean_cache; }

static ThreadMXBean threadMXBean_load() {
  return ManagementFactory.getThreadMXBean();
}



}