feat: add 2022 solutions

2022/day-01/solution.test.ts

@@ -0,0 +1,16 @@
+import { test, expect } from 'bun:test';
+
+import { solvePart1, solvePart2 } from './solution.ts';
+
+const inputFile = Bun.file(import.meta.dir + '/input.txt');
+const input = await inputFile.text();
+
+test('part 1', () => {
+    expect(solvePart1(input)).toEqual(68923);
+})
+
+test('part 2', () => {
+    expect(solvePart2(input)).toEqual(200044);
+})
+
+

2022/day-01/solution.ts

@@ -0,0 +1,43 @@
+const solve = (input: string): [number, number] => {
+    let maxCalories1 = 0; // calories >= 0
+    let maxCalories2 = 0;
+    let maxCalories3 = 0;
+
+    const elvesCalories = input.split('\n\n'); // \n\n = empty line between elves
+
+    elvesCalories.forEach((elfCalories) => {
+        const elfCaloriesParsed = elfCalories.split('\n');
+
+        // count the sum of the elf's calories
+        const elfCaloriesSum = elfCaloriesParsed.reduce((sum, elfCalorie) => {
+            return sum + Number(elfCalorie);
+        }, 0);
+
+        if (elfCaloriesSum >= maxCalories1) {
+            maxCalories3 = maxCalories2;
+            maxCalories2 = maxCalories1;
+            maxCalories1 = elfCaloriesSum;
+        } else if (elfCaloriesSum >= maxCalories2) {
+            maxCalories3 = maxCalories2;
+            maxCalories2 = elfCaloriesSum;
+        } else if (elfCaloriesSum >= maxCalories3) {
+            maxCalories3 = elfCaloriesSum;
+        }
+    });
+
+    return [maxCalories1, maxCalories1 + maxCalories2 + maxCalories3];
+}
+
+const solvePart1 = (input: string): number => {
+    const [maxCalories] = solve(input)
+    return maxCalories;
+};
+
+const solvePart2 = (input: string): number => {
+    const [_, maxCaloriesTop3] = solve(input)
+    return maxCaloriesTop3;
+};
+
+export { solvePart1, solvePart2 };
+
+