Solve 2025-05

2025/05/2025-05.run.xml

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+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="2025-05" type="BunRunConfiguration">
+    <option name="program" value="2025/05/run.ts" />
+    <option name="workingDirectory" value="$PROJECT_DIR$" />
+    <method v="2" />
+  </configuration>
+</component>

2025/05/index.test.ts

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+import { describe, expect, it } from 'bun:test';
+import { solveFirst, solveSecond } from './index.ts';
+
+describe('2025-05', () => {
+  const testInput = `3-5
+10-14
+16-20
+12-18
+
+1
+5
+8
+11
+17
+32`;
+  it('first', () => {
+    expect(solveFirst(testInput)).toBe(3);
+  });
+  it('second', () => {
+    expect(solveSecond(testInput)).toBe(14);
+  });
+});

2025/05/index.ts

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+import type { Coordinate } from '../../utils/coordinates.ts';
+
+function parseRanges(input: string) {
+  return Array.from(
+    input.matchAll(/(\d*)-(\d*)/gm),
+    (m) => [Number(m[1]), Number(m[2])] as Coordinate
+  );
+}
+
+export function solveFirst(input: string): number {
+  const [r, i] = input.split('\n\n');
+
+  const ranges = parseRanges(r);
+
+  const ingredients = i.split('\n').map(Number);
+
+  return ingredients.filter((i) =>
+    ranges.some(([from, to]) => i >= from && i <= to)
+  ).length;
+}
+
+export function solveSecond(input: string): number {
+  const ranges = parseRanges(input).toSorted((a, b) => a[0] - b[0]);
+
+  let total = 0;
+
+  ranges.reduce((lastEnd, curr) => {
+    if (curr[1] <= lastEnd) {
+      return lastEnd;
+    }
+    total += curr[1] - Math.max(lastEnd + 1, curr[0]) + 1;
+    return curr[1];
+  }, 0);
+
+  return total;
+}

2025/05/run.ts

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+import { join } from 'path';
+import { solveFirst, solveSecond } from './index.ts';
+
+const input = await Bun.file(join(__dirname, 'input.txt')).text();
+
+const firstAnswer = solveFirst(input);
+
+console.log(firstAnswer);
+
+const secondAnswer = solveSecond(input);
+
+console.log(secondAnswer);