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authorAleteoryx <alyx@aleteoryx.me>2024-12-09 21:09:57 -0500
committerAleteoryx <alyx@aleteoryx.me>2024-12-09 21:09:57 -0500
commit0f6d3c97e450d129b020b6fe2f3d63bc0bc7aa61 (patch)
tree4068a09e59fb383481618ff3746d6053bb70e341 /2024/tcl
parent3cb8f4912dac55f840089940374f92e7c618c3c0 (diff)
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2024.8
Diffstat (limited to '2024/tcl')
-rwxr-xr-x2024/tcl/08.tcl69
1 files changed, 69 insertions, 0 deletions
diff --git a/2024/tcl/08.tcl b/2024/tcl/08.tcl
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+#!/bin/env tclsh
+
+source lib.tcl
+setup 8 grid
+
+puts {Part 1: Antinode count in map}
+
+set antinodes {}
+set resonant_antinodes {}
+set antennae {}
+
+for {set x 0} {$x < $input(w)} {incr x} {
+ for {set y 0} {$y < $input(h)} {incr y} {
+ set cell [lindex $input(grid) $y $x]
+ if {[regexp {[a-zA-Z0-9]} $cell]} {
+ if [dict exists $antennae $cell] {
+ foreach antenna [dict keys [dict get $antennae $cell]] {
+ lassign $antenna x2 y2
+ dict set resonant_antinodes [list $x $y] 1
+ dict set resonant_antinodes [list $x2 $y2] 1
+
+ set xoff [expr {$x - $x2}]
+ set yoff [expr {$y - $y2}]
+
+ set ax [expr {$x + $xoff}]
+ set ay [expr {$y + $yoff}]
+ if {$ax >= 0 && $ax < $input(w) && $ay >= 0 && $ay < $input(h)} {
+ dict set antinodes [list $ax $ay] 1
+
+ while {$ax >= 0 && $ax < $input(w) && $ay >= 0 && $ay < $input(h)} {
+ dict set resonant_antinodes [list $ax $ay] 1
+ set ax [expr {$ax + $xoff}]
+ set ay [expr {$ay + $yoff}]
+ }
+ }
+
+ set ax [expr {$x2 - $xoff}]
+ set ay [expr {$y2 - $yoff}]
+ if {$ax >= 0 && $ax < $input(w) && $ay >= 0 && $ay < $input(h)} {
+ dict set antinodes [list $ax $ay] 1
+
+ while {$ax >= 0 && $ax < $input(w) && $ay >= 0 && $ay < $input(h)} {
+ dict set resonant_antinodes [list $ax $ay] 1
+ set ax [expr {$ax - $xoff}]
+ set ay [expr {$ay - $yoff}]
+ }
+ }
+ }
+ }
+ dict set antennae $cell [list $x $y] 1
+ }
+ }
+}
+
+puts "Antinodes: [llength [dict keys $antinodes]]"
+
+puts ""
+puts {Part 2: Resonant antinode count in map}
+
+puts "Resonant Antinodes: [llength [dict keys $resonant_antinodes]]"
+
+#foreach ra [dict keys $resonant_antinodes] {
+# lassign $ra x y
+# lset input(debug) $y $x "#"
+#}
+
+#foreach line $input(debug) {
+# puts [join $line ""]
+#}