After day 256?
$ cat 06b.rkt #lang racket (require (prefix-in aoc: "aoc.rkt") (prefix-in aoc6: "06a.rkt") ) (define (aoc06b . args) ; Return the population of the given lanternfish population ; after it's been aged by 256 days. If no population is given, ; use the contest problem input; otherwise assume the argument ; is the string representation of a problem input. (aoc6:lanternfish-population-growth 256 (apply aoc:read-comma-separated-numbers (cons 6 args)))) (module+ main (aoc06b) ) (module+ test (require rackunit) (check-equal? (aoc06b aoc6:example-data) 26984457539) (check-equal? (aoc06b) 1708791884591) ) $ raco test 06b.rkt raco test: (submod "06b.rkt" test) 2 tests passed $