day 06

aoc_2023/day-06/example.test.ts

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+import { expect, test } from "bun:test";
+import { main as part1 } from "./part_1";
+import { main as part2 } from "./part_2";
+
+const example = `Time:      7  15   30
+Distance:  9  40  200`.split("\n");
+
+test("part1", async () => {
+  const answer = 288;
+  const res = await part1(example);
+  expect(res).toEqual(answer);
+});
+
+test("part2", async () => {
+  const answer = 71503;
+  const res = await part2(example);
+  expect(res).toEqual(answer);
+});

aoc_2023/day-06/logs/out_1.txt

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+=== COMPUTATION ===
+
+[ 48, 93, 85, 95 ] [ 296, 1928, 1236, 1391 ]
+
+=== /COMPUTATION ===
+
+=== ANSWER TO P1 ===
+2756160

aoc_2023/day-06/logs/out_2.txt

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+=== COMPUTATION ===
+
+
+=== /COMPUTATION ===
+
+=== ANSWER TO P2 ===
+34788142

aoc_2023/day-06/part_1.ts

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+export const main = async (lines: string[]): Promise<number | string> => {
+  const times = lines[0]
+    .split(":")
+    .at(1)!
+    .split(" ")
+    .filter((x) => x)
+    .map((x) => parseInt(x));
+
+  const distances = lines[1]
+    .split(":")
+    .at(1)!
+    .split(" ")
+    .filter((x) => x)
+    .map((x) => parseInt(x));
+
+  console.log(times, distances);
+
+  let prod = 1;
+
+  for (let i = 0; i < distances.length; i++) {
+    const [time, record] = [times[i], distances[i]];
+
+    let winTimes = 0;
+
+    for (
+      let buttonPressLength = 0;
+      buttonPressLength <= time;
+      buttonPressLength++
+    ) {
+      const timeTraveled = time - buttonPressLength;
+      const totalDistance = buttonPressLength * timeTraveled;
+
+      if (totalDistance > record) winTimes++;
+    }
+
+    prod *= winTimes;
+  }
+
+  return prod;
+};
+
+//
+
+const isrun = process.argv.length > 1 && process.argv[1] === import.meta.path;
+if (isrun) {
+  const file = Bun.file("./problem.txt");
+  const text = await file.text();
+  const lines = text.split("\n").filter((x) => x && x.length);
+
+  console.log("=== COMPUTATION ===\n");
+
+  const answer = await main(lines);
+
+  console.log("\n=== /COMPUTATION ===\n");
+
+  console.log("=== ANSWER TO P1 ===");
+  console.log(answer);
+}

aoc_2023/day-06/part_2.ts

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+export const main = async (lines: string[]): Promise<number | string> => {
+  const distance = parseInt(lines[1].split(":").at(1)!.replaceAll(" ", ""));
+
+  const time = parseInt(lines[0].split(":").at(1)!.replaceAll(" ", ""));
+
+  let winTimes = 0;
+
+  for (
+    let buttonPressLength = 0;
+    buttonPressLength <= time;
+    buttonPressLength++
+  ) {
+    const timeTraveled = time - buttonPressLength;
+    const totalDistance = buttonPressLength * timeTraveled;
+
+    if (totalDistance > distance) winTimes++;
+  }
+
+  return winTimes;
+};
+
+//
+
+const isrun = process.argv.length > 1 && process.argv[1] === import.meta.path;
+if (isrun) {
+  const file = Bun.file("./problem.txt");
+  const text = await file.text();
+  const lines = text.split("\n").filter((x) => x && x.length);
+
+  console.log("=== COMPUTATION ===\n");
+
+  const answer = await main(lines);
+
+  console.log("\n=== /COMPUTATION ===\n");
+
+  console.log("=== ANSWER TO P2 ===");
+  console.log(answer);
+}

aoc_2023/day-06/problem.txt

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+Time:        48     93     85     95
+Distance:   296   1928   1236   1391