Day 6 done

day6-ts/day6.ts

@@ -0,0 +1,53 @@
+type Race = {
+  time: number;
+  distance: number;
+};
+const races: Race[] = [];
+
+const timeFrom = new Date().getTime();
+
+// const input = `Time:        47     70     75     66
+// Distance:   282   1079   1147   1062`.split("\n");
+
+const input = `Time:        47707566
+Distance:   282107911471062`.split("\n");
+
+// parse input
+const [t, ...rtimes] = input[0].split(" ");
+const times = rtimes.filter((o) => o !== "").map((o) => Number(o));
+const [d, ...rdist] = input[1].split(" ");
+const dist = rdist.filter((o) => o !== "").map((o) => Number(o));
+
+let mul = 1;
+
+for (let i = 0; i < times.length; i++) {
+  races.push({ time: times[i], distance: dist[i] });
+}
+console.log(races);
+
+function getDistance(race: Race, holdTime: number): number {
+  return (race.time - holdTime) * holdTime;
+}
+
+for (const race of races) {
+  let from = 1;
+  let to = 1;
+  for (let i = 0; i < race.time; i++) {
+    if (getDistance(race, i) > race.distance) {
+      from = i;
+      break;
+    }
+  }
+  for (let i = race.time; i >= 0; i--) {
+    if (getDistance(race, i) > race.distance) {
+      to = i;
+      break;
+    }
+  }
+  mul *= to - from + 1;
+}
+
+console.log(mul);
+
+const timeTotal = new Date().getTime() - timeFrom;
+console.log(`Time took: ${timeTotal}ms`);