: (circular?) ( seq n -- ? )
dup 0 > [
2dup rotate 10 digits>integer
- prime? [ 1- (circular?) ] [ 2drop f ] if
+ prime? [ 1 - (circular?) ] [ 2drop f ] if
] [
2drop t
] if ;
: circular? ( seq -- ? )
- dup length 1- (circular?) ;
+ dup length 1 - (circular?) ;
PRIVATE>