Bit of work on day19
This commit is contained in:
parent
75aeb9ae0f
commit
1cd256a12a
GPG key ID:
5B2020A0F9921EF4
202
2021/nim/day19.nim
Normal file
202
2021/nim/day19.nim
Normal file
|
|
@ -0,0 +1,202 @@
|
|||
import ./common, std/[sequtils, algorithm, sugar, sets, strformat, strutils, tables, options, json, hashes]
|
||||
|
||||
type
|
||||
Vec3 = array[3, int]
|
||||
BeaconPositions = seq[Vec3]
|
||||
Sensors = seq[BeaconPositions]
|
||||
Vec3Pair = array[2, Vec3]
|
||||
DumbDistTable = TableRef[int, Vec3Pair]
|
||||
|
||||
proc dumbDist(a: Vec3, b: Vec3): int =
|
||||
result = abs(a[0]-b[0]) + abs(a[1]-b[1]) + abs(a[2]-b[2])
|
||||
# echo &"dumbDist: {result} from {a} to {b}"
|
||||
|
||||
proc parse(s: string): Vec3 =
|
||||
let l = s.split(",", 3).map parseInt
|
||||
[l[0], l[1], l[2]]
|
||||
|
||||
proc parse(l: openArray[string]): Sensors =
|
||||
var sb: seq[Vec3] = @[]
|
||||
for line in l:
|
||||
if line == "":
|
||||
result.add sb
|
||||
continue
|
||||
elif line[0] == '-' and line[1] == '-':
|
||||
sb = @[]
|
||||
else: sb.add line.parse
|
||||
result.add sb
|
||||
|
||||
proc p1(input: Sensors): uint64 =
|
||||
var sensorsDumbDistTable = newTable[int, DumbDistTable]()
|
||||
for i,s in input.pairs:
|
||||
echo s
|
||||
var dumbDistTable: DumbDistTable = newTable[int, Vec3Pair]()
|
||||
for pair in product([s, s]):
|
||||
if pair[0] == pair[1]: continue
|
||||
dumbDistTable[dumbDist(pair[0], pair[1])] = [pair[0], pair[1]]
|
||||
sensorsDumbDistTable[i] = dumbDistTable
|
||||
var sensorMatches = newTable[int, int]()
|
||||
for s1, ddt1 in sensorsDumbDistTable:
|
||||
var maxMatches = 0
|
||||
let kkeys = ddt1.keys.toSeq.sorted
|
||||
echo &"Sorted {kkeys.len} Keys for Sensor {s1}: {kkeys}"
|
||||
for s2, ddt2 in sensorsDumbDistTable:
|
||||
if s1 == s2: continue
|
||||
var ddMatches: seq[int] = @[]
|
||||
for dd, vs in ddt1:
|
||||
if ddt2.hasKey(dd): ddMatches.add dd
|
||||
if ddMatches.len > maxMatches:
|
||||
maxMatches = ddMatches.len
|
||||
sensorMatches[s1] = s2
|
||||
echo &"{s1} and {s2} have {ddMatches.len} dd matches: {ddMatches}"
|
||||
# TODO once we have a solid guess of which sensors overlap using the dumbDist
|
||||
# method, we'll need to actual math (probably?) to figure out how figure out
|
||||
# the relative translation and rotation of the overlapping sensor using the
|
||||
# matched points. once we can do that, we can "correct" the points from each
|
||||
# sensor's beacons and remove overlapping onces.
|
||||
# barring "actual math", I hate to imagine that this ends with brute-forcing
|
||||
echo sensorMatches
|
||||
0
|
||||
|
||||
proc p2(input: Sensors): uint64 =
|
||||
0'u64
|
||||
|
||||
const input = """
|
||||
--- scanner 0 ---
|
||||
404,-588,-901
|
||||
528,-643,409
|
||||
-838,591,734
|
||||
390,-675,-793
|
||||
-537,-823,-458
|
||||
-485,-357,347
|
||||
-345,-311,381
|
||||
-661,-816,-575
|
||||
-876,649,763
|
||||
-618,-824,-621
|
||||
553,345,-567
|
||||
474,580,667
|
||||
-447,-329,318
|
||||
-584,868,-557
|
||||
544,-627,-890
|
||||
564,392,-477
|
||||
455,729,728
|
||||
-892,524,684
|
||||
-689,845,-530
|
||||
423,-701,434
|
||||
7,-33,-71
|
||||
630,319,-379
|
||||
443,580,662
|
||||
-789,900,-551
|
||||
459,-707,401
|
||||
|
||||
--- scanner 1 ---
|
||||
686,422,578
|
||||
605,423,415
|
||||
515,917,-361
|
||||
-336,658,858
|
||||
95,138,22
|
||||
-476,619,847
|
||||
-340,-569,-846
|
||||
567,-361,727
|
||||
-460,603,-452
|
||||
669,-402,600
|
||||
729,430,532
|
||||
-500,-761,534
|
||||
-322,571,750
|
||||
-466,-666,-811
|
||||
-429,-592,574
|
||||
-355,545,-477
|
||||
703,-491,-529
|
||||
-328,-685,520
|
||||
413,935,-424
|
||||
-391,539,-444
|
||||
586,-435,557
|
||||
-364,-763,-893
|
||||
807,-499,-711
|
||||
755,-354,-619
|
||||
553,889,-390
|
||||
|
||||
--- scanner 2 ---
|
||||
649,640,665
|
||||
682,-795,504
|
||||
-784,533,-524
|
||||
-644,584,-595
|
||||
-588,-843,648
|
||||
-30,6,44
|
||||
-674,560,763
|
||||
500,723,-460
|
||||
609,671,-379
|
||||
-555,-800,653
|
||||
-675,-892,-343
|
||||
697,-426,-610
|
||||
578,704,681
|
||||
493,664,-388
|
||||
-671,-858,530
|
||||
-667,343,800
|
||||
571,-461,-707
|
||||
-138,-166,112
|
||||
-889,563,-600
|
||||
646,-828,498
|
||||
640,759,510
|
||||
-630,509,768
|
||||
-681,-892,-333
|
||||
673,-379,-804
|
||||
-742,-814,-386
|
||||
577,-820,562
|
||||
|
||||
--- scanner 3 ---
|
||||
-589,542,597
|
||||
605,-692,669
|
||||
-500,565,-823
|
||||
-660,373,557
|
||||
-458,-679,-417
|
||||
-488,449,543
|
||||
-626,468,-788
|
||||
338,-750,-386
|
||||
528,-832,-391
|
||||
562,-778,733
|
||||
-938,-730,414
|
||||
543,643,-506
|
||||
-524,371,-870
|
||||
407,773,750
|
||||
-104,29,83
|
||||
378,-903,-323
|
||||
-778,-728,485
|
||||
426,699,580
|
||||
-438,-605,-362
|
||||
-469,-447,-387
|
||||
509,732,623
|
||||
647,635,-688
|
||||
-868,-804,481
|
||||
614,-800,639
|
||||
595,780,-596
|
||||
|
||||
--- scanner 4 ---
|
||||
727,592,562
|
||||
-293,-554,779
|
||||
441,611,-461
|
||||
-714,465,-776
|
||||
-743,427,-804
|
||||
-660,-479,-426
|
||||
832,-632,460
|
||||
927,-485,-438
|
||||
408,393,-506
|
||||
466,436,-512
|
||||
110,16,151
|
||||
-258,-428,682
|
||||
-393,719,612
|
||||
-211,-452,876
|
||||
808,-476,-593
|
||||
-575,615,604
|
||||
-485,667,467
|
||||
-680,325,-822
|
||||
-627,-443,-432
|
||||
872,-547,-609
|
||||
833,512,582
|
||||
807,604,487
|
||||
839,-516,451
|
||||
891,-625,532
|
||||
-652,-548,-490
|
||||
30,-46,-14
|
||||
""".strip().split('\n').parse
|
||||
doDayX 19, (n: int) => n.loadInput.parse, p1, p2, (input, 79'u64, 0'u64)
|
||||
Loading…
Reference in a new issue