from math import hypot 
class Vector:
 def __init__( self, x = 0, y = 0):
	 self.x = x
	 self.y = y
 def __repr__( self):
	 return 'Vector(% r, %r)' % (self.x, self.y) 
 def __abs__( self): 
         return hypot( self.x, self.y)
 #def __bool__( self):
 #	 return bool( abs( self)) 
 def __bool__( self):
	 return bool( abs( self)) 
 def __add__( self, other):
         x = self.x + other.x
         y = self.y + other.y
         return Vector(x,y)
 def __mul__(self, scalar):
	 return Vector(self.x * scalar, self.y * scalar)
