(( 150 11 ))










11 11




(( ))





(( 3 150 4 ))











(( ))





2 (( ))













(( 20 5 ))





1

.





3





(( 1 ))





1 (( ))





(( 180 ))








(( 1 1 ))





((




))





(( 120 ))




( ) ( ) 21 .