//  •¡‘f�”ŠÖ�”ŒvŽZƒvƒ�ƒOƒ‰ƒ€t
//  �@ CMULT(•¡‘f�æŽZ)�ACXN(•¡‘f�”‚Ì�®�”ƒxƒL�æ)
//     CLOG(•¡‘f‘Î�”ŠÖ�”)�ACEXP(•¡‘fŽw�”ŠÖ�”)
//     CPOWER(•¡‘f�”‚Ì•¡‘fƒxƒL�æ)
//   2009”N04ŒŽ30“ú�@Œã •Û”Í�i“Œ‹ž�HŒ|‘åŠw)
import java.awt.*;
class cmult{
  public void CMULT(double x[],double y[],double z[]){
    z[0]=x[0]*y[0]-x[1]*y[1];
    z[1]=x[0]*y[1]+x[1]*y[0];}
  public void CXN(int n,double x[],double z[]){
    double W0, W1;
    W0 = x[0];  W1 = x[1];
    for (int k=1; k<n; k++)
      { z[0]=x[0]*W0-x[1]*W1;
        z[1]=x[0]*W1+x[1]*W0; 
        W0 = z[0];  W1 = z[1]; }
    }
  public void CLOG(double x[],double y[]){
    y[0] = Math.log(Math.sqrt(x[0]*x[0]+x[1]*x[1]));
    y[1] = Math.atan2(x[1],x[0]); }
  public void CEXP(double x[],double y[]){
    y[0] = Math.exp(x[0])*Math.cos(x[1]);
    y[1] = Math.exp(x[0])*Math.sin(x[1]); }
  public void CPOWER(double x[],double y[],double z[]){
    double V[] = new double[2];
    double W[] = new double[2];
    if(x[0]==0.0 && x[1]==0.0) { z[0]=z[1]=0.0; }
    else {
      CLOG(x,V);
      CMULT(y,V,W);
      CEXP(W,z); }
  }  }