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| author | Hunky Jimpjorps <thechairman@thechairman.info> | 2022-12-17 00:04:08 -0500 |
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| committer | Hunky Jimpjorps <thechairman@thechairman.info> | 2022-12-17 00:04:08 -0500 |
| commit | 0089fadd7a41d73ff67ff896d0fa4cb8b273e1bc (patch) | |
| tree | 72b2f2c6fda56bd3279835903756824730a5d735 /2022 | |
| parent | 481deaca4a5429fa05131947c2caf29e0f4bef10 (diff) | |
| download | gleam_aoc-0089fadd7a41d73ff67ff896d0fa4cb8b273e1bc.tar.gz gleam_aoc-0089fadd7a41d73ff67ff896d0fa4cb8b273e1bc.zip | |
day 16 in progress
Diffstat (limited to '2022')
| -rw-r--r-- | 2022/day-16/day-16.rkt | 33 |
1 files changed, 18 insertions, 15 deletions
diff --git a/2022/day-16/day-16.rkt b/2022/day-16/day-16.rkt index c7fe654..2503da1 100644 --- a/2022/day-16/day-16.rkt +++ b/2022/day-16/day-16.rkt @@ -39,30 +39,33 @@ ;; part 1 (define (find-best-single-route start + [minutes-left 30] [current-pressure 0] - [available-valves valve-flows] - [minutes-left 30]) + [available-valves valve-flows]) (cond [(>= minutes-left 1) - (for/fold ([running-pressure current-pressure]) + (for/fold ([running-pressure current-pressure] + [remaining-valves available-valves] + #:result (cons running-pressure remaining-valves)) ([candidate (reachable-destinations start available-valves minutes-left)]) (match-define (cons dest travel-time) candidate) (define minutes-left* (- minutes-left (add1 travel-time))) - (define candidate-pressure + (match-define (cons candidate-pressure remaining-valves*) (find-best-single-route dest + minutes-left* (+ current-pressure (* (hash-ref valve-flows dest) minutes-left*)) - (hash-remove available-valves dest) - minutes-left*)) - (if (> candidate-pressure running-pressure) candidate-pressure running-pressure))] - [else current-pressure])) + (hash-remove available-valves dest))) + (if (> candidate-pressure running-pressure) + (values candidate-pressure remaining-valves*) + (values running-pressure remaining-valves*)))] + [else (cons current-pressure available-valves)])) -(find-best-single-route "AA") +(car (find-best-single-route "AA")) ;; part 2 -(define (find-best-double-route start - [current-pressure 0] - [available-valves valve-flows] - [minutes-left 30]) - 'todo) +; (define (find-best-double-route start) +; (define done-by-me (find-best-single-route start 26)) +; (define done-by-elephant (find-best-single-route start 26 0 (cdr done-by-me))) +; (+ (car done-by-me) (car done-by-elephant))) -(find-best-double-route "AA") +; (find-best-double-route "AA") |