 649

()    ()   

100/
1 \	\
\	
	 
	 

+		   /
	1 !\	
	\^ 100\	
-		

()    ()   

	 
	 
100	/
N	
/	
	

 /
\ l

100

 
 

()     
(.. )

100

()     
(.. )



 

          ^ 

.,,  ...        ^ 

^<\            /


 

 ""

 
 

100

()   ()   

'100

/

 
 

+	\.  
	'<  
0	iolK

()    
 

()     
 

		
		
+		
		
	^^^~"<"
		/
		 
	/100	 


		 
+		 
	^^100	/
0		
	\	\ 
		
		
		

. 20.4.      