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compare: magical:c55423d6f3245e8016da1f583fcd2310f48bd658
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12 Commits
1c770538b7 ... c55423d6f3

Author SHA1 Message Date
magical c55423d6f3 day 12 cleanup 2023-12-12 09:41:08 +00:00
magical 99405e2ad0 day 12 solution 2023-12-12 09:27:06 +00:00
magical e8a6d55fa8 day 11 part 2 2023-12-12 04:56:27 +00:00
magical b7062a7801 day 11 part 1 2023-12-11 05:31:14 +00:00
magical 55158903e6 day 10 much faster fill with numpy 2023-12-10 07:39:06 +00:00
magical 3b5b9f3839 day 10 more efficient fill 
i also tried getting rid of the 'next' dict and just keeping track of a
boolean of whether we changed anything on each pass, but that made it
slower somehow. cache effects i guess?
 2023-12-10 07:03:54 +00:00
magical 3ba6804013 day 10 cleanup, make fill slighly more efficient 2023-12-10 06:43:32 +00:00
magical c111075e16 day 10 part 2 2023-12-10 06:30:14 +00:00
magical a395a39fac day 10 part 1 2023-12-10 05:35:54 +00:00
magical 395ad666c8 fix lmul 2023-12-09 07:16:10 +00:00
magical 484c0744fb add a note 2023-12-09 07:15:58 +00:00
magical 99621f071a day 9 solution 2023-12-09 05:27:36 +00:00
18 changed files with 1936 additions and 1 deletions
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7 28 58 104 184 327 573 973 1589 2494 3772 5518 7838 10849 14679 19467 25363 32528 41134 51364 63412
2 9 15 18 16 7 -11 -40 -82 -139 -213 -306 -420 -557 -719 -908 -1126 -1375 -1657 -1974 -2328
-2 -8 -22 -36 -30 32 216 659 1677 4012 9338 21221 46842 99962 205876 409585 789396 1480256 2715538 4904886 8782742
3 10 27 73 182 407 824 1536 2677 4416 6961 10563 15520 22181 30950 42290 56727 74854 97335 124909 158394
10 19 44 102 227 482 972 1856 3356 5774 9577 15730 26695 48929 98377 211450 465398 1013941 2146626 4383766 8623131
10 31 72 149 284 512 899 1586 2882 5437 10534 20547 39620 74630 136505 241976 415850 693899 1126468 1782913 2756988
11 33 74 146 273 497 898 1641 3074 5923 11677 23368 47206 96055 196723 404751 833173 1706029 3453804 6877118 13417719
8 21 58 132 265 504 939 1721 3091 5469 9726 17876 34585 70136 145929 304513 628138 1274073 2543782 5020872 9847569
-4 -8 -14 -25 -37 -22 109 583 1910 5132 12220 26671 54365 104750 192431 339247 576928 950432 1522070 2376535 3626959
18 38 82 173 347 653 1153 1922 3048 4632 6788 9643 13337 18023 23867 31048 39758 50202 62598 77177 94183
15 28 47 91 191 388 741 1353 2420 4300 7589 13199 22512 37951 64995 118188 236764 521302 1213228 2857007 6615220
14 21 37 81 183 388 760 1386 2380 3887 6087 9199 13485 19254 26866 36736 49338 65209 84953 109245 138835
16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160 168 176
3 8 23 61 141 288 533 913 1471 2256 3323 4733 6553 8856 11721 15233 19483 24568 30591 37661 45893
14 30 57 99 167 295 569 1169 2424 4880 9381 17163 29961 50129 80773 125897 190562 281058 405089 571971 792843
-6 -7 -10 -4 37 154 403 855 1596 2727 4364 6638 9695 13696 18817 25249 33198 42885 54546 68432 84809
1 6 25 68 141 255 458 900 1941 4312 9339 19240 37505 69369 122388 207128 337977 534090 820477 1229244 1800997
17 27 53 113 230 432 752 1228 1903 2825 4047 5627 7628 10118 13170 16862 21277 26503 32633 39765 48002

3
day09/sample1.in 100644
View File

@ -0,0 +1,3 @@
0 3 6 9 12 15
1 3 6 10 15 21
10 13 16 21 30 45

51
day09/sol.tcl 100755
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@ -0,0 +1,51 @@
#!/usr/bin/env tclsh
source ../prelude.tcl
proc diff {lst} {
set out {}
for {set i 1} {$i < [llength $lst]} {incr i} {
lappend out [expr {[lindex $lst $i] - [lindex $lst [expr {$i-1}]]}]
}
return $out
}
proc allzeros {lst} {
foreach x $lst {
if {$x != 0} { return 0 }
}
return 1
}
proc predict {lst} {
#puts "predict $lst"
if {[allzeros $lst]} {
return 0
}
return [expr {[lindex $lst end] + [predict [diff $lst]]}]
}
proc unpredict {lst} {
# note: this could be
# return [predict [lreverse $lst]]
if {[allzeros $lst]} {
return 0
}
return [expr {[lindex $lst 0] - [unpredict [diff $lst]]}]
}
proc solve input {
set fw {}
set bw {}
while {[gets $input line] >= 0} {
set next [predict $line]
set prev [unpredict $line]
lappend fw $next
lappend bw $prev
puts "$prev {$line} $next"
}
puts [ladd $fw]
puts [ladd $bw]
}
solve stdin

140
day10/input 100644
View File

@ -0,0 +1,140 @@
F7.-.|.-F777F7.7-|F-7-7J.-J-7-JFFFJ-F--7FJ-|7F-JF|-F.|F-7-F7-L-.FF-|7.--FL-L7-J-FJF-F7F--77..F|.F--7F777|-JJ7FJF---J-L7L-F-LJ7F.|F7JJ-777.-|
7F||LF7F7L-J7||.|.JL-7LFFJFF7.LFF7|.J7F7JJ|L-JFJFJF--FF7L|.-.|-FJL7|-FJ.-F7J.FJ|LJF.L|J|F-L7.F|FL-7LJ|7FL7|.|-LJ7JJL--FJL77JJLL7.F||7|L|-7JJ
F-J|L|F7|7JLFF7-L-J7.JFJJ.|LJ7||JJF7|J|J-F-7-F7-|FF-FJ||7.|F-L-7-.L.LJJ77LL-7J.|JJL7.|7FF-||||F---JF7L-7J--FJFJ.L7-FJ7L77JLJ.|LLF7.-|-7LL777
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|J.|.7-..|J7L--JLFJ||||LJF-JFJLJFLJL7L--7-L-JLL-JL-7F7FJ-LJ-LJL--7|LJ|F7|F--L-J-FF--JL7||LJ-L7|LJ-L7LJF7F-7|.L-J7JJ|LLFLJL|F-77J.-7F-7-L7J|J
7JFLJ-7FJ--JJJ.|7.-LJ|L7-L-7|JL|77F-JF7FJ7F|7J|.F--J||L77.|.FF7F-J|F7LJ|L7LF|7J|JL-7F-J|L-7J.LJLLJLL-7|LJFJL7JLJJ.LJ-F||F-F|.J7FL.|7F-.|FJL|
|--JJFJ|-L-7|FFF7-FJ.L-JJ.LLJ7-L--|F7|LJ.-J|F-|-|F--JL-JJF7.FJLJF7LJL-7|FJ||JL777.FJL-7L-7|FFJ|JLLF|LLJ|FL-7L7|-FLF-F7.F|7F77FF7J7||7|-L-.F7
-7-|.L--J7-|--LL-7|FFLJF77L|F|-L|F|||L7|.|FFL7LFLJ7JF|LL-LLFL--7|L-7F-JLJJJL7.|JJFL7F-JJLLJJ|LL77LL7F|FL7LF|FJJFL7|-FJL|J-JJLL-LJF7J-FF7L|7.
L|.7-7FJ-J--7LJ-FLJJ-.FJL77.|.FFL-LJ|FJ7-LL7L|FLJJLFJ.|.LF||FJ|LJF-JL--7|.L---L7.LFJL-7..L||7.LL-F7L7J||F--|||FJ7FJ||FFF.LJ-7JJJ.||FFJ.L..F-
F7-|J||F|-7LJ|F-7|77LL--L-F7LL--F7|FJL-7..|F-F-|L|FL7--.F-F7JF-7.L--7F-J-.J-L-|||LL---J7|-|F77.J.LJLL-77|LFLJ7J.--7|JF|LJFF7.LF7L7-7J.LL-F.J
||.L-L-7-F7JLF|L|J-7-L-F.|L-FJ|.LJFL---JJFLF7.7|F-JLF7LFJFJ7.JLJFJJFJ|-J|7..|7JF-7LLJ|FL7.-JJLFL.-JL7|LF7FLJJ|.J.L7J.|.FLL--7||FFJ.J-FJJ-F-J
|LF7F|.L----F-77||.|FL7|.L.||L|JJF7FJJJ|LL7FL7L7|7.-L7-J|L|J-L7|L|7|FJ7FL---|7.L.F.|.F-F-|JLJFF..L7J.|-LF7..FL7JF.L----JLJLL---7L.|.-J|7FLF.
|J||7LJ|.||.L7L--7F-|7LJ.|..|7||-JLJJ-77FLJJ-|J||-7|JJ|L-.L7|F|-J.L||J77F7|F-J.|F--77JLLL|-F--|-|-77LJJ|LFLJJL|LF7|-7F--F|7.LFJ7-|.L7FLL|LJ7
J-F-JJJF7-|7.|.LJ-LJ|LL7LFJ-7-|7FLF|.FFL7.||.J--J-|7.L|7|.FJ-7.|J|F||-J7JL|J7.FFJ|7||-..L|-J7F|LF7-|.-.F-JFFL-|L|-7|.|L77.FF7-7L7LFLJ||J.F-7
.FF.J.F7J.L--LF7J.|.LJ7||L|F7|JJF.|JFLJL|7LL7-||JJL|-7JF--|J7|.FFJ7LJ7|JLFJLJ7L.L-77|L|-.L.|-FL7.FJ.FJF-J.F|-FJ||.FJ-.|.F-L-F.F-F-7.FF|JFL7.
-L|JL--J--J.LLLL7-F7-L-L-JL-JL..L-.L|J.F7-JL|--J---JJJLLL-7--FJLLLFJL-|JJL--LFL7.LLL-7JLLJ-7-J.F-FJ-L-LJJF7JL|JLF7J.L-L--JJ.|.LJ.LJ.-7J.L7-7

9
day10/sample10.in 100644
View File

@ -0,0 +1,9 @@
...........
.S-------7.
.|F-----7|.
.||.....||.
.||.....||.
.|L-7.F-J|.
.|..|.|..|.
.L--J.L--J.
...........

10
day10/sample15.in 100644
View File

@ -0,0 +1,10 @@
FF7FSF7F7F7F7F7F---7
L|LJ||||||||||||F--J
FL-7LJLJ||||||LJL-77
F--JF--7||LJLJ7F7FJ-
L---JF-JLJ.||-FJLJJ7
|F|F-JF---7F7-L7L|7|
|FFJF7L7F-JF7|JL---7
7-L-JL7||F7|L7F-7F7|
L.L7LFJ|||||FJL7||LJ
L7JLJL-JLJLJL--JLJ.L

5
day10/sample6.in 100644
View File

@ -0,0 +1,5 @@
.....
.S-7.
.|.|.
.L-J.
.....

5
day10/sample8.in 100644
View File

@ -0,0 +1,5 @@
..F7.
.FJ|.
SJ.L7
|F--J
LJ...

131
day10/sol.py 100644
View File

@ -0,0 +1,131 @@
import sys
from collections import defaultdict
map = [x.strip() for x in sys.stdin]
print(map)
Y = len(map)
X = len(map[0])
assert all(len(row) == X for row in map)
N,E,S,W = 1,2,4,8
unknown = 0b11111
grid = {}
start = None
for i, row in enumerate(map):
for j,c in enumerate(row):
d = 0
if c == ".": d = 0
elif c == "7": d = W|S
elif c == "J": d = N|W
elif c == "L": d = N|E
elif c == "F": d = S|E
elif c == "|": d = N|S
elif c == "-": d = W|E
elif c == "S":
d = unknown
start = (i,j)
else:
raise Exception("invalid char %s at (%s,%s)" % (c, i, j))
grid[i,j] = d
#print(grid)
def find_loop(grid, start):
front = [(0,start)]
dist = {}
count = defaultdict(int)
count[start] -= 1
def push(i,j,from_):
if grid.get((i,j),0)&from_:
front.append((cost+1, (i,j)))
while front:
front.sort()
cost, n = front.pop(0)
if n not in grid:
continue
count[n] += 1
if n in dist:
continue
dist[n] = cost
i, j = n
d = grid[n]
if d&N: push(i-1,j,S)
if d&S: push(i+1,j,N)
if d&W: push(i,j-1,E)
if d&E: push(i,j+1,W)
#print(count.values())
if not all(c == 2 for c in count.values()):
# not a loop
return {}
return dist
def enclosedby(grid, points):
# upsample by 3x3
import numpy
fill = numpy.zeros((Y*3,X*3+1), dtype='uint8')
#fill = [[0]*(X*3) for _ in range(Y*3)]
for i,j in points:
d = grid[i,j]
if d == N|S: t=[[0,1,0],[0,1,0],[0,1,0]]
elif d == N|W: t=[[0,1,0],[1,1,0],[0,0,0]]
elif d == N|E: t=[[0,1,0],[0,1,1],[0,0,0]]
elif d == S|W: t=[[0,0,0],[1,1,0],[0,1,0]]
elif d == S|E: t=[[0,0,0],[0,1,1],[0,1,0]]
elif d == E|W: t=[[0,0,0],[1,1,1],[0,0,0]]
else: raise Exception("invalid d=%d at (%s,%s)" % (d, i, j))
for k in range(3):
for l in range(3):
fill[i*3+k, j*3+l] = t[k][l]
def draw(fill):
for row in fill:
print("".join(".+O"[f] for f in row))
draw(fill)
# fill edges
for i in range(Y*3):
if fill[i, 0 ] == 0: fill[i, 0 ] = 2
if fill[i, X*3-1] == 0: fill[i, X*3-1] = 2
for j in range(X*3):
if fill[ 0 , j] == 0: fill[ 0 , j] = 2
if fill[Y*3-1, j] == 0: fill[Y*3-1, j] = 2
# flood fill
changed = True
while changed:
#draw(fill)
changed = False
for i in range(Y*3):
f = (fill[i] == 2)
f = numpy.roll(f, 1) | numpy.roll(f, -1)
if i > 0: f |= (fill[i-1] == 2)
if i < Y*3-1: f |= (fill[i+1] == 2)
f[-1] = False
f &= (fill[i] == 0)
if f.any():
fill[i, f] = 2
changed = True
draw(fill)
# downsample
inside = []
for i,j in grid:
f = [fill[i*3+k, j*3+l]==0 for k in range(3) for l in range(3)]
if all(f):
inside.append((i,j))
print("inside =", inside)
return len(inside)
for D in [W|S, N|W, N|E, S|E, N|S, W|E]:
grid[start] = D
loop = find_loop(grid, start)
if loop:
print(D, loop.keys())
print(max(loop.values()))
print(enclosedby(grid, loop))

140
day11/input 100644
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@ -0,0 +1,140 @@
.#...........#.........................................................................#...............#...........#........................
.......................#....................................................................................................................
...............................#...........#.................#.............................#.............................................#..
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............................#...............................................................................................................
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10
day11/sample1.in 100644
View File

@ -0,0 +1,10 @@
...#......
.......#..
#.........
..........
......#...
.#........
.........#
..........
.......#..
#...#.....

84
day11/sol.tcl 100755
View File

@ -0,0 +1,84 @@
#!/usr/bin/env tclsh
source ../prelude.tcl
set input stdin
set map [split [string trim [read $input]] "\n"]
puts $map
proc empty {row} { return [regexp {^\.+$} $row] }
proc column {i} {
global map
set c {}
foreach row $map {
lappend c [string index $row $i]
}
return [join $c ""]
}
proc solve {map expansion} {
set xdist {}
set ydist {}
foreach row $map {
if {[empty $row]} {
lappend ydist $expansion
} else {
lappend ydist 1
}
}
set W [string length [lindex $map 0]]
for {set i 0} {$i < $W} {incr i} {
set col [column $i]
if {[empty $col]} {
lappend xdist $expansion
} else {
lappend xdist 1
}
}
puts [join $map "\n"]
puts "xdist $xdist"
puts "ydist $ydist"
set points {}
for {set y 0} {$y < [llength $map]} {incr y} {
set row [lindex $map $y]
for {set x 0} {$x < [string length $row]} {incr x} {
if {[string index $row $x] eq "#"} {
lappend points $x $y
}
}
}
puts $points
proc dist {x y u v} {
upvar xdist xdist
upvar ydist ydist
if {$v < $y} { lassign [list $y $v] v y }
return [ladd [concat [lrange $xdist $x+1 $u] [lrange $ydist $y+1 $v] ]]
}
set mins {}
foreach {x y} $points {
#set d 100000
foreach {u v} $points {
if {$u > $x || ($u == $x && $v > $y)} {
#set d [min $d [dist $x $y $u $v]]
lappend mins [dist $x $y $u $v]
}
}
#lappend mins $d
}
puts $mins
puts [ladd $mins]
}
solve $map 2
solve $map 100
solve $map 1000
solve $map 1000000

1000
day12/input 100644
View File

File diff suppressed because it is too large Load Diff

6
day12/sample1.in 100644
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@ -0,0 +1,6 @@
#.#.### 1,1,3
.#...#....###. 1,1,3
.#.###.#.###### 1,3,1,6
####.#...#... 4,1,1
#....######..#####. 1,6,5
.###.##....# 3,2,1

6
day12/sample2.in 100644
View File

@ -0,0 +1,6 @@
???.### 1,1,3
.??..??...?##. 1,1,3
?#?#?#?#?#?#?#? 1,3,1,6
????.#...#... 4,1,1
????.######..#####. 1,6,5
?###???????? 3,2,1

42
day12/sol.tcl 100755
View File

@ -0,0 +1,42 @@
#!/usr/bin/env tclsh
source ../prelude.tcl
set input stdin
proc expand {row {start 0}} {
set i [string first {?} $row $start]
if {$i < 0} {
return [list $row]
}
set a [string replace $row $i $i "."]
set b [string replace $row $i $i "#"]
incr i
return [concat [expand $a $i] [expand $b $i]]
}
proc match {row nums} {
#puts -nonewline " $row -> "
set row [string map {. " "} $row]
#puts " $row"
foreach group $row n $nums {
if {[string length $group] != $n} {
return 0
}
}
return 1
}
set part1 0
while {[gets $input line] >= 0} {
set n 0
lassign $line row nums
set nums [split $nums ","]
foreach x [expand $row] {
#puts $x
if {[match $x $nums]} {
incr n
}
}
puts "$n | $row $nums"
incr part1 $n
}
puts $part1

93
day12/sol2.tcl 100755
View File

@ -0,0 +1,93 @@
#!/usr/bin/env tclsh
source ../prelude.tcl
set input stdin
proc count-memo {row nums i left} {
global memo
if {$i == 0} {
array unset memo
}
set key "$i,$left,[llength $nums]"
if {[info exists memo($key)]} {
#puts "$key exists"
return $memo($key)
}
set n [count $row $nums $i $left]
set memo($key) $n
return $n
}
proc count {row nums i left} {
#puts [list count $row $nums $i $left]
if {$i >= [string length $row]} {
return [expr {($left > 1 || [llength $nums] > 0) ? 0 : 1}]
}
if {[llength $nums] <= 0 && $left <= 0} {
return [expr {[string first "#" $row $i] >= 0 ? 0 : 1}]
}
set c [string index $row $i]
incr i
if {$c eq "."} {
if {$left > 1} {
# contradiction: expecting a "#"
return 0
} elseif {$left == 1} {
# left counts the number of "#" left in the current group,
# plus the "." at the end. if left==1 then we've seen all
# the "#" and now we need to see a "."
set left 0
} else {
# nothing
}
return [count-memo $row $nums $i $left]
}
if {$c eq "#"} {
if {$left > 1} {
incr left -1
} elseif {$left == 1} {
# contradiction: expecting a "."
return 0
} else {
set nums [lassign $nums left] ;# shift nums
}
return [count-memo $row $nums $i $left]
}
if {$c eq "?"} {
if {$left > 1} {
# must be "#"
incr left -1
#set row [string replace $row $i-1 $i-1 "#"]
return [count-memo $row $nums $i $left]
} elseif {$left == 1} {
# must be "."
set left 0
#set row [string replace $row $i-1 $i-1 "."]
return [count-memo $row $nums $i $left]
} else {
# bifurcate
# "."
#set row [string replace $row $i-1 $i-1 "."]
set a [count-memo $row $nums $i $left]
set nums [lassign $nums left]
# "#"
#set row [string replace $row $i-1 $i-1 "#"]
set b [count-memo $row $nums $i $left]
return [expr {$a + $b}]
}
}
error "invalid character '$c' at position $i"
}
set part1 0
set part2 0
while {[gets $input line] >= 0} {
lassign $line row nums
set row "$row?$row?$row?$row?$row"
#set row [string trim $row "."]
set nums [split $nums ","]
set nums [concat $nums $nums $nums $nums $nums]
set n [count-memo $row $nums 0 0]
puts "$n | $row $nums"
incr part2 $n
}
puts $part2

2
prelude.tcl
View File

@ -12,7 +12,7 @@ proc ladd {list} {
proc lmul {list} {
set p 1
foreach x $list { set p [eval {$p * $x}] }
foreach x $list { set p [expr {$p * $x}] }
return $p
}