day 2

src/2023/day02.js

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+function parse(input) {
+  const lines = input.split('\n');
+  return lines.map(line => {
+    let [game, ...rounds] = line.split(/[:; ] /);
+    game = +game.split(' ')[1];
+    rounds = rounds.map(round => {
+      return round.split(', ').map(d => {
+        const [count, color] = d.split(' ');
+        return { count: +count, color };
+      });
+    });
+    return { game, rounds };
+  });
+}
+
+export function part1(input) {
+  const games = parse(input);
+  const good = games.filter(({ rounds }) =>
+    rounds.flat().every(({ color, count }) => {
+      return (
+        (color === 'red' && count <= 12) ||
+        (color === 'green' && count <= 13) ||
+        (color === 'blue' && count <= 14)
+      );
+    }),
+  );
+  return good.reduce((acc, { game }) => acc + game, 0);
+}
+
+export function part2(input) {
+  const games = parse(input);
+  const powers = games.map(({ rounds }) => {
+    const dice = rounds.flat();
+    const max = ['red', 'blue', 'green'].map(c => {
+      const counts = dice.filter(({ color }) => color === c);
+      return Math.max(...counts.map(({ count }) => count), 0);
+    });
+    return max[0] * max[1] * max[2];
+  });
+  return powers.reduce((acc, power) => acc + power, 0);
+}

src/2023/day02.spec.js

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+import { part1, part2 } from './day02.js';
+import readInput from '../utils/read-input.js';
+
+const input = readInput(import.meta.url);
+
+describe('day02 2023', () => {
+  describe('part1', () => {
+    it('should work for part 1 examples', () => {
+      expect(
+        part1(
+          [
+            'Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green',
+            'Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue',
+            'Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red',
+            'Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red',
+            'Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green',
+          ].join('\n'),
+        ),
+      ).toEqual(8);
+    });
+
+    it('should work for part 1 input', () => {
+      expect(part1(input)).toEqual(2593);
+    });
+  });
+
+  describe('part2', () => {
+    it('should work for part 2 examples', () => {
+      expect(
+        part2(
+          [
+            'Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green',
+            'Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue',
+            'Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red',
+            'Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red',
+            'Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green',
+          ].join('\n'),
+        ),
+      ).toEqual(2286);
+    });
+
+    it('should work for part 2 input', () => {
+      expect(part2(input)).toEqual(54699);
+    });
+  });
+});

src/2023/day02.txt

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+Game 1: 13 green, 3 red; 4 red, 9 green, 4 blue; 9 green, 10 red, 2 blue
+Game 2: 3 red, 8 green, 1 blue; 4 green, 11 blue, 2 red; 3 blue, 2 red, 6 green; 5 green, 15 blue, 1 red; 2 blue, 2 red, 5 green; 12 blue, 7 green, 2 red
+Game 3: 1 red, 9 green, 3 blue; 8 green, 4 red, 11 blue; 6 red, 10 blue; 6 green, 6 red, 12 blue; 2 blue, 11 green, 7 red; 12 blue, 9 green, 8 red
+Game 4: 7 red, 2 green, 1 blue; 12 green; 12 green
+Game 5: 15 red, 3 green, 1 blue; 6 red, 2 blue, 2 green; 3 green, 3 red, 1 blue; 2 blue, 13 red, 5 green; 2 green, 15 red, 2 blue
+Game 6: 3 blue, 15 red, 1 green; 8 green, 5 red, 6 blue; 9 green, 5 blue, 6 red; 9 green, 3 blue, 9 red; 10 green, 14 red, 2 blue
+Game 7: 6 green, 1 red, 11 blue; 6 green, 1 red, 3 blue; 4 green, 20 blue; 2 red, 5 blue, 4 green; 10 green, 17 blue
+Game 8: 10 blue, 9 green, 10 red; 9 green, 1 red; 8 red, 9 green, 9 blue; 5 green, 3 red, 7 blue
+Game 9: 7 blue, 1 red; 5 red, 4 green; 4 green, 6 red, 5 blue; 2 green, 4 blue; 3 green, 6 blue, 4 red; 1 green, 3 red, 3 blue
+Game 10: 2 red, 2 green, 2 blue; 10 blue, 2 red, 1 green; 2 green, 9 blue, 3 red
+Game 11: 8 red, 4 blue, 1 green; 3 red; 1 green; 2 green, 3 blue
+Game 12: 10 red, 2 green, 4 blue; 4 red, 2 green; 1 blue, 1 red, 1 green; 10 red, 1 green, 5 blue
+Game 13: 20 blue, 9 green, 7 red; 13 red, 13 blue, 16 green; 17 blue, 6 red, 6 green; 1 red, 1 blue, 9 green; 9 blue, 18 green, 7 red
+Game 14: 6 blue, 14 red; 9 red, 8 blue; 2 red, 1 green, 8 blue; 3 blue, 1 green, 9 red; 8 blue, 2 green, 1 red
+Game 15: 3 red, 1 blue, 5 green; 2 red, 3 green; 5 red, 5 green, 1 blue; 2 green, 6 red; 4 red, 1 blue; 6 red, 1 blue, 1 green
+Game 16: 5 blue, 7 red, 2 green; 7 red, 12 blue; 10 blue, 11 green, 5 red; 11 red, 11 blue, 10 green
+Game 17: 3 red, 7 blue; 1 blue, 14 green, 4 red; 11 blue, 4 red, 11 green; 18 blue, 5 red, 11 green; 18 blue, 1 red, 8 green
+Game 18: 8 green, 2 red, 6 blue; 8 blue, 11 green; 2 red, 11 blue, 9 green
+Game 19: 11 red, 9 green, 3 blue; 19 green, 9 red, 2 blue; 19 green, 4 blue, 4 red; 1 green, 11 red; 10 red, 2 green, 4 blue
+Game 20: 2 blue, 3 red, 1 green; 1 red, 3 green; 7 blue, 1 green, 4 red; 1 red, 8 blue, 7 green; 6 blue, 3 red; 5 red, 3 blue, 7 green
+Game 21: 1 green, 1 blue, 10 red; 1 green, 5 red, 8 blue; 11 red, 4 blue; 6 blue, 6 red
+Game 22: 6 blue, 6 green; 8 green, 15 blue; 8 green, 3 blue, 1 red; 11 blue, 2 red, 7 green
+Game 23: 1 green, 3 blue, 7 red; 4 red, 1 green, 2 blue; 3 red, 2 blue, 2 green
+Game 24: 4 green, 8 blue, 4 red; 2 green, 9 blue; 4 green, 1 red; 2 green, 5 blue, 1 red; 2 blue, 3 red, 3 green; 6 blue
+Game 25: 7 blue; 15 blue, 5 red; 6 blue, 12 red; 1 green, 17 red; 13 blue, 5 red; 17 red
+Game 26: 1 blue, 3 green, 7 red; 9 red, 4 green, 1 blue; 1 red, 2 green, 1 blue; 11 red, 3 green; 10 red, 4 green, 2 blue; 6 red, 4 green
+Game 27: 4 blue, 6 red; 2 blue, 8 red, 1 green; 3 blue, 3 red; 2 red, 1 blue; 1 green, 3 blue, 6 red
+Game 28: 1 red, 7 blue, 7 green; 2 green, 1 red, 4 blue; 8 green, 2 red; 2 red, 7 blue, 5 green; 12 green, 5 blue, 2 red; 1 red, 1 green, 2 blue
+Game 29: 10 green, 3 red, 6 blue; 9 green, 6 blue, 4 red; 3 red, 2 blue, 17 green
+Game 30: 8 blue; 15 blue, 1 red; 10 green, 2 red, 13 blue
+Game 31: 10 green, 2 blue, 7 red; 2 green, 1 blue; 1 blue, 15 green, 2 red; 7 green, 2 blue; 3 blue, 6 green, 8 red; 6 red, 1 blue
+Game 32: 2 blue, 2 red, 11 green; 10 green, 2 red, 1 blue; 1 green, 2 blue; 2 red, 9 green, 2 blue; 2 blue, 1 green; 5 green, 1 blue, 2 red
+Game 33: 8 red, 6 blue; 2 green, 3 red, 2 blue; 1 green, 13 red, 18 blue
+Game 34: 7 blue, 5 green; 5 green, 8 blue; 13 blue, 15 red, 2 green
+Game 35: 1 blue, 2 green; 9 green; 4 red, 14 green; 1 red, 1 blue, 17 green
+Game 36: 2 red, 14 green, 4 blue; 13 green, 3 blue; 1 blue, 7 green, 2 red; 4 blue, 9 green; 1 green, 3 blue, 1 red; 2 red, 4 blue, 10 green
+Game 37: 2 blue, 7 green, 5 red; 5 green, 2 blue; 6 blue, 11 red
+Game 38: 6 green, 6 red; 9 red, 10 green; 2 blue, 8 green, 8 red
+Game 39: 10 red, 3 blue; 5 green, 3 red; 5 red, 7 green
+Game 40: 5 red, 14 green, 2 blue; 5 red, 7 blue, 12 green; 2 green, 4 red; 1 red, 16 green, 3 blue; 16 green, 4 red, 7 blue; 9 green, 2 red
+Game 41: 4 red, 3 green, 2 blue; 13 green, 6 blue; 2 red, 14 green, 1 blue; 7 blue, 2 red, 14 green
+Game 42: 4 red; 1 blue, 5 red; 1 green, 6 red; 1 red, 1 blue; 3 blue, 8 red
+Game 43: 7 blue, 16 red, 1 green; 2 red, 6 green, 1 blue; 5 green, 3 red; 5 green, 9 blue, 2 red; 3 red, 9 blue, 4 green; 7 red, 9 blue
+Game 44: 2 red, 2 green; 5 red, 1 blue, 8 green; 7 green, 3 blue, 5 red
+Game 45: 8 blue, 16 red; 8 blue; 4 blue, 1 green, 8 red
+Game 46: 11 green, 9 blue, 1 red; 8 green, 7 blue; 10 blue, 1 red, 1 green; 12 green, 10 blue
+Game 47: 3 green, 6 red, 1 blue; 2 blue, 2 green, 12 red; 3 red, 2 green, 1 blue
+Game 48: 3 red, 3 green, 3 blue; 3 red, 4 green, 2 blue; 2 green, 7 red, 1 blue; 2 red, 3 blue, 5 green
+Game 49: 5 red, 7 blue, 5 green; 10 red, 4 green, 7 blue; 9 red, 17 green; 6 green, 1 red, 2 blue; 7 green, 8 blue, 5 red
+Game 50: 2 red, 4 green, 16 blue; 4 blue, 3 red, 8 green; 4 blue, 2 red, 6 green
+Game 51: 16 green, 10 red, 14 blue; 8 red, 4 blue, 12 green; 14 green, 7 blue; 6 red, 20 green, 3 blue
+Game 52: 1 red, 1 blue, 1 green; 9 green, 9 red; 4 green, 13 red; 7 red, 11 green; 4 red, 1 blue; 8 green, 3 red, 1 blue
+Game 53: 4 green, 11 blue; 9 green, 2 red; 6 red, 18 green, 13 blue; 6 red, 2 blue, 14 green
+Game 54: 1 green, 1 red, 1 blue; 2 green, 4 blue; 4 blue, 5 green; 3 blue, 1 red, 10 green
+Game 55: 8 blue, 2 red, 3 green; 9 red, 11 blue; 1 green, 12 blue, 4 red; 3 green, 17 red; 3 red, 3 green, 15 blue; 7 blue, 7 red, 2 green
+Game 56: 3 blue, 13 green; 9 green, 2 blue; 1 red, 2 blue, 16 green
+Game 57: 6 blue, 4 red; 3 green, 6 red; 2 red, 3 blue, 3 green; 8 red, 5 blue
+Game 58: 4 red, 15 green, 5 blue; 1 red, 16 blue, 14 green; 2 green, 17 blue, 6 red; 20 blue, 3 red, 7 green; 17 green, 1 red, 12 blue
+Game 59: 3 blue, 14 red; 5 green, 10 red, 2 blue; 2 blue, 5 red, 6 green
+Game 60: 4 red, 1 blue, 1 green; 15 blue; 8 green, 14 blue, 4 red; 9 blue, 3 green, 4 red; 4 green, 2 red, 11 blue; 4 blue, 7 green
+Game 61: 5 green, 9 blue, 16 red; 4 blue, 12 green, 4 red; 17 red, 7 green, 5 blue; 19 blue, 12 red, 17 green; 8 green, 13 red
+Game 62: 13 green, 1 red, 7 blue; 9 blue, 1 red, 4 green; 14 green, 2 red, 2 blue; 3 green
+Game 63: 6 green; 7 red, 3 blue, 8 green; 5 blue, 1 green, 6 red; 6 green, 6 red, 2 blue; 8 green, 2 blue
+Game 64: 16 blue, 1 red, 2 green; 4 green, 1 blue, 6 red; 6 green, 2 blue, 2 red; 17 blue; 1 red; 13 blue, 6 green, 1 red
+Game 65: 8 red, 3 green, 7 blue; 6 blue, 8 red, 2 green; 2 blue, 3 green, 17 red
+Game 66: 2 blue, 3 green, 3 red; 3 red, 2 blue; 5 red, 4 green, 3 blue; 1 blue, 3 green; 2 red, 1 green, 1 blue; 2 blue, 4 green
+Game 67: 2 red, 3 blue, 15 green; 2 blue, 2 red, 17 green; 4 blue, 3 red, 2 green; 6 red; 3 red, 8 green
+Game 68: 7 red, 1 blue, 12 green; 17 red, 1 green; 10 red, 8 green; 16 red, 5 green, 2 blue; 4 red, 1 blue, 8 green; 8 green, 7 red, 2 blue
+Game 69: 17 green, 9 red, 2 blue; 1 blue, 14 green, 3 red; 9 red, 12 green, 2 blue; 11 green, 2 blue, 7 red
+Game 70: 1 green, 8 blue, 2 red; 2 red, 10 green, 1 blue; 1 red, 12 green, 6 blue; 9 green, 4 blue, 4 red; 2 red, 6 green; 3 red, 8 green, 6 blue
+Game 71: 1 red, 5 blue; 12 blue, 3 red; 3 red, 2 green, 4 blue; 5 blue, 3 green, 1 red
+Game 72: 11 red, 6 blue; 1 red, 1 blue, 1 green; 2 blue, 7 red; 18 blue, 3 red; 1 green, 1 blue, 12 red
+Game 73: 4 red, 2 blue, 1 green; 3 red; 5 red, 1 blue; 4 blue, 6 red
+Game 74: 2 red; 2 red, 5 green; 4 green, 1 red, 1 blue; 1 blue, 5 green, 5 red; 7 red, 1 blue, 3 green; 8 red, 1 blue, 6 green
+Game 75: 13 blue, 2 red, 2 green; 2 red, 9 blue; 2 red, 9 blue, 5 green
+Game 76: 2 red, 3 green, 18 blue; 2 red, 11 green, 5 blue; 6 green, 8 blue, 2 red; 4 blue; 7 green, 14 blue
+Game 77: 5 blue, 8 red, 1 green; 2 blue, 5 green, 12 red; 3 red, 4 blue
+Game 78: 1 blue, 2 green, 16 red; 2 red, 3 green; 1 red, 4 green, 2 blue; 11 red; 2 green, 12 red, 2 blue; 11 red, 5 green, 3 blue
+Game 79: 10 green, 3 blue, 2 red; 8 red, 3 blue, 8 green; 5 green, 3 red, 11 blue; 9 green, 16 blue
+Game 80: 1 red, 4 blue; 6 green, 1 red; 6 green, 3 blue, 1 red; 6 green, 2 red; 7 green, 1 blue; 2 red, 2 blue, 2 green
+Game 81: 10 blue, 4 red, 4 green; 5 green, 1 red, 7 blue; 11 blue, 8 green, 2 red; 8 green, 2 red
+Game 82: 12 green, 1 red, 3 blue; 6 red, 1 blue; 16 green, 3 red, 4 blue; 8 blue; 7 blue, 7 green, 2 red; 4 red, 19 green
+Game 83: 4 red, 4 blue, 3 green; 8 blue, 4 green, 6 red; 6 green, 7 blue, 6 red; 11 red, 6 green, 7 blue
+Game 84: 11 red, 2 green, 2 blue; 20 green, 2 blue, 13 red; 15 red, 6 green, 3 blue; 17 green, 7 red
+Game 85: 3 blue, 5 green, 2 red; 12 green, 2 blue, 1 red; 7 blue, 6 green, 5 red; 11 red, 2 blue, 17 green; 11 blue, 11 red, 17 green; 18 green, 9 red, 13 blue
+Game 86: 1 blue, 14 red; 4 green, 1 blue, 3 red; 2 green, 1 blue, 13 red; 1 green, 1 blue, 10 red
+Game 87: 2 red, 5 green, 4 blue; 3 blue, 9 red, 6 green; 7 blue, 9 red, 11 green; 10 green, 11 red, 9 blue; 7 green, 12 red, 4 blue; 5 blue, 1 red, 7 green
+Game 88: 11 red, 1 green; 9 blue, 4 green, 7 red; 10 red, 4 green, 1 blue; 4 green, 1 red, 1 blue; 10 blue, 1 red, 3 green; 2 green, 12 blue, 11 red
+Game 89: 3 green, 3 blue; 1 red, 7 green, 9 blue; 8 red, 11 blue, 11 green; 2 green, 6 blue, 5 red; 5 blue, 9 green
+Game 90: 3 blue, 10 red, 2 green; 2 blue; 8 red
+Game 91: 2 red, 10 green, 2 blue; 9 blue; 8 green, 5 red, 10 blue; 7 green, 6 blue, 5 red; 1 green, 6 red, 12 blue; 1 red, 4 green, 3 blue
+Game 92: 12 blue, 5 red, 2 green; 4 blue, 1 red, 3 green; 6 red, 6 blue; 1 blue, 8 red, 6 green; 6 blue, 3 red, 2 green; 7 green, 4 red, 1 blue
+Game 93: 3 blue; 8 blue; 3 blue, 2 red; 2 red, 1 green
+Game 94: 5 red, 7 blue, 6 green; 15 red, 7 blue, 4 green; 6 blue, 1 red, 2 green; 7 green, 4 blue, 17 red; 12 red, 5 green, 1 blue
+Game 95: 7 blue, 11 red, 9 green; 10 red, 6 blue, 7 green; 6 blue, 6 red, 7 green
+Game 96: 2 red, 1 green, 3 blue; 3 blue, 1 green; 1 green, 1 blue; 1 red, 1 blue; 1 green, 1 red, 4 blue
+Game 97: 6 red, 1 blue, 7 green; 2 blue, 5 red, 7 green; 8 red, 3 blue, 6 green; 6 green, 1 red, 3 blue; 5 red, 2 blue, 14 green; 3 green, 6 red, 6 blue
+Game 98: 9 red, 14 blue; 19 red, 4 blue; 11 red, 17 blue; 14 blue, 1 green, 18 red
+Game 99: 1 green, 1 red, 12 blue; 2 green, 4 red, 14 blue; 4 blue, 6 red; 10 red, 2 green, 1 blue
+Game 100: 5 red, 9 green, 2 blue; 9 blue, 6 green, 1 red; 8 blue, 7 green, 3 red
+