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adventofcode2023
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day 14 part 2

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magical 2023-12-14 09:46:06 +00:00
parent cf548cb740
commit 5ad3c05219
1 changed files with 45 additions and 1 deletions
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46
day14/sol.tcl
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@ -6,12 +6,28 @@ proc roll-left lane {
set prev {} set prev {}
while {$prev ne $lane} { while {$prev ne $lane} {
set prev $lane set prev $lane
#regsub -all {(O+)(\.+)} $lane {\2\1} lane
regsub -all {(\.+)(O+)} $lane {\2\1} lane regsub -all {(\.+)(O+)} $lane {\2\1} lane
} }
return $lane return $lane
} }
proc roll-right lane {
set prev {}
while {$prev ne $lane} {
set prev $lane
regsub -all {(O+)(\.+)} $lane {\2\1} lane
}
return $lane
}
proc cycle map {
set map [lmap l [transpose $map] {roll-left $l}] ;# North
set map [lmap l [transpose $map] {roll-left $l}] ;# West
set map [lmap l [transpose $map] {roll-right $l}] ;# South
set map [lmap l [transpose $map] {roll-right $l}] ;# East
return $map
}
proc calc-load lane { proc calc-load lane {
set N [slen $lane] set N [slen $lane]
set load 0 set load 0
@ -36,3 +52,31 @@ foreach l [transpose $map] {
incr part1 $n incr part1 $n
} }
puts $part1 puts $part1
puts [cycle $map]
puts [cycle [cycle $map]]
puts [cycle [cycle [cycle $map]]]
set start $map
set x 1
set warp 0
set goal 1000000000
for {set i 1} {$i <= $goal} {incr i} {
set map [cycle $map]
set ld [ladd [lmap l [transpose $map] {calc-load $l}]]
puts "$i ($ld) | $map"
#if {$i >= $x} {
#set x [expr {$x*10}]
#}
if {!$warp} {
if {[info exists seen($map)]} {
puts "$i == $seen($map)"
set warp [expr {$i - $seen($map)}]
incr i [expr {int(($goal - $i)/$warp)*$warp}]
puts "warping to $i"
}
set seen($map) $i
}
}
#puts "$goal\t| $map"
#puts [ladd [lmap l [transpose $map] {calc-load $l}]]