1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | DIM a( 4 , 4 ) DATA 0 , 0 , 0 , 1 , 0 , 0 , 1 , 2 , 0 , 1 , 2 , 3 , 1 , 2 , 3 , 4 FOR i= 1 TO 4 FOR j= 1 TO 4 READ a(i,j) NEXT NEXT FOR i= 1 TO 4 FOR j= 1 TO 4 PRINT a(i,j);" "; NEXT PRINT NEXT FOR i= 1 TO 4 FOR j= 1 TO 4 FOR k= 1 TO 4 FOR l= 1 TO 4 IF (i<>k) AND (j<>l) AND (a(i,j)=a(k,l) THEN f= 1 NEXT NEXT NEXT NEXT IF f= 1 THEN PRINT "yes" ELSE PRINT "no" |