Initial commit

1/solution.mjs

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+import { readFileSync } from 'node:fs';
+
+const input = readFileSync('input', 'utf-8');
+
+const elfCalories = input
+  .split(/\n{2,}/)
+  .filter(calories => calories)
+  .map(calories =>
+    calories
+      .split('\n')
+      .map(count => parseInt(count))
+  );
+
+const totalElfCalories = elfCalories
+  .map(calories =>
+    calories.reduce((total, count) => total + count, 0)
+  );
+
+totalElfCalories.sort((a, b) => a - b);
+
+const mostCalories = totalElfCalories[totalElfCalories.length - 1];
+console.log(`Elf with most calories has: ${mostCalories}`);
+
+const topThreeCalories = totalElfCalories
+  .slice(-3)
+  .reduce((total, count) => total + count, 0);
+console.log(`Top three calory count: ${topThreeCalories}`);
+

2/solution.mjs

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+import { readFileSync } from 'node:fs';
+
+const input = readFileSync('input', 'utf-8');
+
+const data = input
+  .split('\n')
+  .filter(line => line)
+  .map(line => {
+    const play = line.split(' ');
+    return [
+      ['A', 'B', 'C'].indexOf(play[0]),
+      ['X', 'Y', 'Z'].indexOf(play[1])
+    ]
+  });
+
+const scoreGame = plays =>
+  plays.map(([o, p]) =>
+    (p + 1) + // shape score
+    3 * (o == p) + // draw
+    6 * ((o + 1) % 3 == p) // win
+  );
+
+const wrongScores = scoreGame(data);
+const totalScore = wrongScores.reduce((t, s) => t + s, 0)
+console.log(`Total Score: ${totalScore}`);
+
+const actualPlays = data.map(([o, a]) => [
+  o,
+  (o + [2, 0, 1][a]) % 3
+]);
+const correctScores = scoreGame(actualPlays);
+const correctTotalScore = correctScores.reduce((t, s) => t + s, 0)
+console.log(`Correct Total Score: ${correctTotalScore}`);
+