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Diffstat (limited to 'aoc2019/day-02/day-02.rkt')
| -rw-r--r-- | aoc2019/day-02/day-02.rkt | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/aoc2019/day-02/day-02.rkt b/aoc2019/day-02/day-02.rkt deleted file mode 100644 index 56019e8..0000000 --- a/aoc2019/day-02/day-02.rkt +++ /dev/null @@ -1,32 +0,0 @@ -#lang racket - -(require advent-of-code - threading) - -(define initial-opcodes - (parameterize ([current-readtable (make-readtable #f #\, #\space #f)]) - (port->list read (open-aoc-input (find-session) 2019 2 #:cache #true)))) - -;; part 1 -(define (edit-opcode ocs oc-1 oc-2) - (~> ocs (list-set 1 oc-1) (list-set 2 oc-2))) - -(define (run-intcode ocs) - (for/fold ([ocs ocs] #:result (car ocs)) - ([pointer (in-range 0 (length initial-opcodes) 4)] #:break (= 99 (list-ref ocs pointer))) - (define op - (match (list-ref ocs pointer) - [1 +] - [2 *])) - (list-set ocs - (list-ref ocs (+ 3 pointer)) - (op (list-ref ocs (list-ref ocs (+ 1 pointer))) - (list-ref ocs (list-ref ocs (+ 2 pointer))))))) - -(~> initial-opcodes (edit-opcode 12 2) run-intcode) - -;; part 2 -(for*/first ([noun (inclusive-range 0 99)] - [verb (inclusive-range 0 99)] - #:when (~> initial-opcodes (edit-opcode noun verb) run-intcode (= 19690720))) - (+ (* 100 noun) verb)) |