2019, tracking

3 files changed, 72 insertions, 0 deletions

diff --git a/2019/day3/part1.in b/2019/day3/part1.in
new file mode 100644
index 0000000..c2e5e1d
--- /dev/null
+++ b/2019/day3/part1.in
@@ -0,0 +1,2 @@
+R998,U494,L814,D519,R407,U983,R307,D745,R64,D29,L935,D919,L272,D473,R689,U560,L942,U264,R816,U745,R209,U227,R241,U111,L653,D108,R823,U254,L263,U987,L368,D76,R665,D646,L759,U425,L581,D826,R829,D388,L234,U33,L48,U598,L708,D764,L414,D75,L163,U802,L183,U893,L486,U947,L393,D694,L454,D600,R377,U312,R89,D178,L652,D751,R402,D946,R213,U985,R994,D336,R573,D105,L442,U965,R603,U508,L17,U191,L37,U678,L506,U823,R878,D709,L348,U167,L355,U314,L164,D672,L309,U895,R358,D769,R869,U598,R63,D68,R105,U133,R357,U588,L154,D631,L939,D235,R506,D885,R958,D896,L195,U292,L952,D616,L824,D497,R99,D121,R387,D155,L70,U580,L890,D368,L910,U645,L786,U977,R9,U781,L454,U783,L382,U321,L195,U196,L239,U764,R18,D71,R97,U77,L803,U963,L704,U94,L511,U747,L798,D905,L679,D135,R455,U650,R947,U14,L722,D245,L490,D183,L276,U559,L901,D767,R827,U522,L380,U494,R402,U70,R589,D582,R206,U756,L989,U427,L704,D864,R885,D9,R872,U454,R912,U752,R197,U304,L728,U879,R456,D410,L141,U473,R246,U498,R443,D297,R333,D123,R12,D665,R684,D531,R601,D13,L260,U60,R302,D514,R416,D496,L562,D334,L608,U74,R451,U251,R961,U166,L368,U146,R962,U973,R120,U808,R480,D536,L690,D958,R292,U333,R656,U305,R46,U831,L756,D907,L638,D969,L445,U541,R784,U148,R338,D264,R72,D637,R759,D709,L611,D34,R99,U305,R143,D191,R673,D753,R387,U994,R720,D896,R95,U703,L499,D453,R96,U808,L485,U127,L856,U357,L543,U382,R411,U969,L532,U64,R303,U457,L412,D140,R146,D67,R147,D681,L1,D994,L876,D504,R46,U683,L992,U640,L663,D681,L327,U840,R543,U97,R988,U792,R36
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diff --git a/2019/day3/smalltest.in b/2019/day3/smalltest.in
new file mode 100644
index 0000000..620a05e
--- /dev/null
+++ b/2019/day3/smalltest.in
@@ -0,0 +1,2 @@
+R75,D30,R83,U83,L12,D49,R71,U7,L72
+U62,R66,U55,R34,D71,R55,D58,R83
diff --git a/2019/day3/wires.pl b/2019/day3/wires.pl
new file mode 100644
index 0000000..fa4ddf1
--- /dev/null
+++ b/2019/day3/wires.pl
@@ -0,0 +1,68 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use List::Util 'min';
+# use Smart::Comments;
+use Data::Dumper;
+
+sub manhattan_distance {
+    my $ref = shift;
+    my ($x, $y) = @{$ref};
+
+    return abs(0 - $x) + abs(0 - $y);
+}
+
+sub pedometer {
+    my $ref = shift;
+    my ($x, $y, $step_1, $step_2) = @{$ref};
+    return $step_1 + $step_2;
+}
+
+my %directions = (
+    'U' => [0, 1],
+    'D' => [0,-1],
+    'R' => [1, 0],
+    'L' => [-1,0]
+);
+
+my $turn = 0;
+my @intersections = ();
+my %map;
+
+while(<>) {
+    chomp;
+    my @path = split /,/;
+    my @coord = (0,0); # Starting point
+    my $num_steps = 0;
+
+    if (!$turn){
+        foreach my $way (@path) {
+            my ($dir, $speed) = ($1, $2) if ($way =~ /(\w)(\d+)/) or die "$!";
+            for (1..$speed) {
+                $coord[0] += @{$directions{$dir}}[0];
+                $coord[1] += @{$directions{$dir}}[1];
+                $num_steps++;
+                $map{"$coord[0],$coord[1]"} = $num_steps;
+            }
+        }
+        $turn = !$turn;
+    } else {
+        foreach my $way (@path) {
+            my ($dir, $speed) = ($1, $2) if ($way =~ /(\w)(\d+)/) or die "$!";
+            for (1..$speed) {
+                $coord[0] += @{$directions{$dir}}[0];
+                $coord[1] += @{$directions{$dir}}[1];
+                $num_steps++;
+                if (exists $map{"$coord[0],$coord[1]"}) {
+                    push @intersections, [@coord,$num_steps,$map{"$coord[0],$coord[1]"}];
+                }
+            }
+        }
+    }
+}
+
+# print Dumper \@intersections;
+print(min(map {pedometer($_);} @intersections));
+
+