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 class SineSoundSource extends VF1<double[]> {
  double freq;
  double sampleRate = 44100;
  double step;
  double phase;
  
  SineSoundSource(double freq, double sampleRate) {
  this.sampleRate = sampleRate;
    calcStep();
  }
  
  SineSoundSource(double freq) {
    calcStep();
  }
  
  void calcStep() {
    step = pi()*2*freq/sampleRate;
  }
  
  public void get(double[] lr) {
    fillDoubleArray(lr, Math.sin(phase)*32767);
    phase += step;
  }
}
static double pi() {
  return Math.PI;
}


static void fillDoubleArray(double[] a, double value) {
  Arrays.fill(a, value);
}




static abstract class VF1<A> implements IVF1<A> {
  public abstract void get(A a);
}


static interface IVF1<A> {
  void get(A a);
}

}