day3

3 files changed, 348 insertions, 0 deletions

diff --git a/day3/data.js b/day3/data.js
new file mode 100644
index 0000000..be1b75d
--- /dev/null
+++ b/day3/data.js
@@ -0,0 +1,327 @@
+const data = [
+  "....#...##.#.........#....#....",
+  "#.......#...#...#.#............",
+  "#..#..#.#.##....#.#........#...",
+  "........##...................#.",
+  "........#...##...#.#.###.......",
+  "##............#...#.....#.##...",
+  "...........#....###...#.....#..",
+  ".......#......#..##..#.....#...",
+  "..#.#..#....#.........#...#..#.",
+  ".........##......#.....##..##..",
+  "........#.....#....#..##......#",
+  "..#..#.......#..............#..",
+  ".....#.#.......................",
+  ".#.#....#.........#............",
+  ".......#.....#.###.............",
+  "......##......#...........#..#.",
+  ".#...............##...#........",
+  ".....#..##........###.........#",
+  "#...........#..#............#..",
+  ".........#....#..#.#......#....",
+  ".......#.........#..##.........",
+  ".##.....#..................#...",
+  "....#............#.#....#.....#",
+  "..#....#...##....#...#.#...#...",
+  "..........#................#.#.",
+  "#...#.#.#.####..#.#..........#.",
+  "..#...#.##......#...........#..",
+  "..#.....#...#.......#......#..#",
+  "..............#.......#........",
+  ".#..#..........#.....#...#..#.#",
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+  "#..................#...........",
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+  "..............#.....#.....#..#.",
+  "#.#.......#..............##.##.",
+  "....#.#.....##....#...........#",
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+  "...........#............###.#..",
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+  ".#.#...##...#...........####...",
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+  ".#..........#.#.......#......##",
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+  ".#.#.#.....#......#.##.........",
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+  ".##.#.###.#........#.##..#...#.",
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+  "....#..##.....##...............",
+  ".#.....#..#............#.....#.",
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+  ".#....#.#.............#.#......",
+  "#...........#............#.#...",
+  "..#.........#.#....#.......##..",
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+  "....##....#...................#",
+  "....#.##....#.............#....",
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+  "............#...#..............",
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+  "...#.#........#..............#.",
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+  "....#...............#.......#..",
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+  "....#.#.#.....#..........##.#..",
+  "..............#.##..........##.",
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+  "..#..#..........#......#.......",
+  "#...#..##.#.#..................",
+  "....#....##......##.#...#....##",
+  ".#...#.#....##.............#..#",
+  "................#......###.....",
+  "..#..#.............#.#.......#.",
+  "..#..................#.......#.",
+  ".....#.......#....#.##...#.##..",
+  ".....##.......#......#..#......",
+  "#..#.......#........#..........",
+  "..#...#..#....#.........#......",
+  "#..#..#......##..#.##....####..",
+  "......##.#.....#..#.......#....",
+  ".##...#.....#..#...#.#.........",
+  "#.....#........###....#...#..#.",
+  ".#....#.#..#......#............",
+  ".........#..#..#.....#........#",
+  "..#.......#..........#..#......",
+  "......#.......##.#....#.#.#....",
+  ".#............#.....#.......#..",
+  "...#..#...............#........",
+  ".....#.........................",
+];
+
+module.exports = data
diff --git a/day3/day3-1.js b/day3/day3-1.js
new file mode 100644
index 0000000..401ac7f
--- /dev/null
+++ b/day3/day3-1.js
@@ -0,0 +1,9 @@
+const data = require('./data')
+
+let trees = 0;
+data.forEach((line, i) => {
+  line[(3 * i)%line.length] === "#" && (trees += 1)
+})
+
+console.log(trees)
+
diff --git a/day3/day3-2.js b/day3/day3-2.js
new file mode 100644
index 0000000..a0c558d
--- /dev/null
+++ b/day3/day3-2.js
@@ -0,0 +1,12 @@
+const data = require('./data')
+const check = (x, y) => {
+  let trees = 0, turn = 0;
+  for(i=0; i<data.length; i=i+y) {
+    turn !== 0 && data[i][(x * turn)%data[i].length] === "#" && (trees += 1)
+    turn += 1
+  }
+  return trees
+}
+
+console.log(check(1,1) * check(3,1) * check(5,1) * check(7,1) * check(1,2))
+