implicit real*8(a-h,o-z)
	DATA SX/0./,SY/0./,X2/0./,XY/0./ 	
	OPEN(5,FILE='minimoscuadrados.txt')
	OPEN(6,FILE='minimoscuadrados.out')
	READ(5,*) N
1	FORMAT(I5)						   
      DO 170 I=1,N
	READ(5,*) X,Y
2	FORMAT(2F10.0)
      SX=SX+X
	SY=SY+Y
	X2=X2+X*X
	XY=XY+X*Y
170	CONTINUE 
	XM=SX/N
	YM=SY/N	 
	A1=(N*XY-SX*SY)/(N*X2-SX*SX)
	A0=YM-A1*XM
	WRITE(6,3) A0,A1
3	FORMAT(' ',2F10.3)
	STOP
	END