82 lines
2.0 KiB
Tcl
82 lines
2.0 KiB
Tcl
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#!/usr/bin/env tclsh
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proc solve {input} {
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set data {}
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while {[gets $input line] >= 0} {
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set color [string trim [lindex $line 2] "()"]
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set dir [lindex {R D L U} [string index $color end]]
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set steps [scan [string range $color 1 end-1] "%x"]
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lappend data $dir $steps $color
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}
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puts $data
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set x 0
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set y 0
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set extra 0
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set yrays {}
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foreach {dir steps color} $data {
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puts "$x $y $dir $steps $color"
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set oldy $y
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set oldx $x
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switch $dir {
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{U} {incr y -$steps}
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{D} {incr y +$steps}
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{L} {incr x -$steps}
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{R} {incr x +$steps}
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}
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if {$oldy < $y} {
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lappend yrays [list $oldy $y $x]
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} elseif {$y < $oldy} {
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lappend yrays [list $y $oldy $x]
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}
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if {$oldy != $y} {
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incr extra [expr {abs($oldy - $y)}]
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}
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if {$oldx != $x} {
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incr extra [expr {abs($oldx - $x)}]
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}
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}
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#puts $yrays
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set ypos {}
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foreach {a b x} [join $yrays] {
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lappend ypos $a $b
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}
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set ypos [lsort -integer -unique $ypos]
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set t 0
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puts $ypos
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foreach y $ypos yn [difference $ypos] {
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if {$yn eq ""} {
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continue
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}
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set xpos {}
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foreach {a b x} [join $yrays] {
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if {$a <= $y && $y < $b} {
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lappend xpos $x
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}
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}
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set xpos [lsort -integer $xpos]
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puts "$y +$yn : $xpos"
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if {[llength $xpos] == 0} { error "no xpos" }
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set in 0
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foreach x $xpos xn [difference $xpos] {
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set in [expr {!$in}]
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if {$in && $xn ne {}} {
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incr t [expr {($xn) * ($yn)}]
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}
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}
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}
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#puts "$t"
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# +1 for the outer perimeter, -1 for the inner perimeter
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incr t [expr {$extra/2 + 1}]
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puts "$t"
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}
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proc difference lst {
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set out {}
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for {set i 1} {$i < [llength $lst]} {incr i} {
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lappend out [expr {[lindex $lst $i] - [lindex $lst $i-1]}]
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}
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return $out
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}
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solve stdin
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