diff options
| -rw-r--r-- | 12/a.rb | 39 | ||||
| -rw-r--r-- | 12/b.rb | 43 | ||||
| -rw-r--r-- | 12/input.txt | 778 |
3 files changed, 860 insertions, 0 deletions
@@ -0,0 +1,39 @@ +instructions = File.readlines('input.txt').map do |line| + [line.slice(0, 1), line.slice(1, line.length).to_i] +end + +n = 0 +e = 0 +direction = 0 + +instructions.each do |instruction| + case instruction[0] + when 'N' + n += instruction[1] + when 'S' + n -= instruction[1] + when 'E' + e += instruction[1] + when 'W' + e -= instruction[1] + when 'F' + case direction + when 0 + e += instruction[1] + when 90 + n += instruction[1] + when 180 + e -= instruction[1] + when 270 + n -= instruction[1] + end + when 'L' + direction += instruction[1] + direction %= 360 + when 'R' + direction -= instruction[1] + direction %= 360 + end +end + +puts n.abs + e.abs @@ -0,0 +1,43 @@ +instructions = File.readlines('input.txt').map do |line| + [line.slice(0, 1), line.slice(1, line.length).to_i] +end + +def rotate n, e, direction + case direction + when 0 + [n, e] + when 90 + [e, -n] + when 180 + [-n, -e] + when 270 + [-e, n] + end +end + +ship_n = 0 +ship_e = 0 +waypoint_n = 1 +waypoint_e = 10 + +instructions.each do |instruction| + case instruction[0] + when 'N' + waypoint_n += instruction[1] + when 'S' + waypoint_n -= instruction[1] + when 'E' + waypoint_e += instruction[1] + when 'W' + waypoint_e -= instruction[1] + when 'F' + ship_n += waypoint_n * instruction[1] + ship_e += waypoint_e * instruction[1] + when 'L' + waypoint_n, waypoint_e = rotate waypoint_n, waypoint_e, instruction[1] + when 'R' + waypoint_n, waypoint_e = rotate waypoint_n, waypoint_e, (-instruction[1] % 360) + end +end + +puts ship_n.abs + ship_e.abs diff --git a/12/input.txt b/12/input.txt new file mode 100644 index 0000000..3231c44 --- /dev/null +++ b/12/input.txt @@ -0,0 +1,778 @@ +E1 +S5 +W5 +R90 +S2 +L90 +F70 +W1 +R90 +E4 +F50 +S2 +F92 +L270 +W2 +S2 +W1 +L270 +W2 +F77 +R180 +F100 +L90 +F45 +W2 +S2 +F68 +L90 +N1 +E4 +S5 +R180 +N1 +L90 +W5 +F59 +E4 +F10 +E1 +F95 +F33 +L180 +F67 +L90 +E3 +L90 +F97 +E5 +L90 +N4 +L180 +E5 +N1 +F70 +E1 +F43 +E3 +R90 +N4 +R90 +F27 +R90 +E1 +L180 +E1 +F24 +F83 +S5 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