static class Vec3{
  float x,y,z;
  Vec3(){
    x = -1;
    y = -1;
    z = -1;
  }
  Vec3(float x, float y, float z){
    this.x = x;
    this.y = y;
    this.z = z;
  }
  boolean equals(float x, float y, float z){
    if(this.x == x && this.y == y && this.z == z) return true;
    else return false;
  }
  float dist(Vec3 c){
    float dx = x - c.x;
    float dy = y - c.y;
    float dz = z - c.z;
    return sqrt(dx * dx + dy * dy + dz * dz);
  }
}
static class geoNeuron{
  double x,y,z;
  double wx,wy,wz;
  geoNeuron(double x, double y, double z){
    this.x = x;
    this.y = y;
    this.z = z;
    this.wx = Math.random();
    this.wy = Math.random();
    this.wz = Math.random();
  }
  double dist(geoNeuron c){
    double dx = this.x - c.x;
    double dy = this.y - c.y;
    double dz = this.z - c.z;
    return Math.sqrt(dx * dx + dy * dy + dz * dz);	
  }
  double wdist(geoNeuron c){
    double dx = this.wx - c.wx;
    double dy = this.wy - c.wy;
    double dz = this.wz - c.wz;
    return Math.sqrt(dx * dx + dy * dy + dz * dz);		
  }
}