Day 6 done

day6-ts/day6.ts

@@ -18,40 +18,35 @@ 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 getSpeed(race: Race, holdTime: number): number {
+function getDistance(race: Race, holdTime: number): number {
   return (race.time - holdTime) * holdTime;
 }
 
-const counts: number[] = [];
-
 for (const race of races) {
   let from = 1;
   let to = 1;
   for (let i = 0; i < race.time; i++) {
-    if (getSpeed(race, i) > race.distance) {
+    if (getDistance(race, i) > race.distance) {
       from = i;
       break;
     }
   }
   for (let i = race.time; i >= 0; i--) {
-    if (getSpeed(race, i) > race.distance) {
+    if (getDistance(race, i) > race.distance) {
       to = i;
       break;
     }
   }
-  counts.push(to - from + 1);
-
+  mul *= to - from + 1;
 }
 
-let mul = 1;
-for (const count of counts) {
-  mul *= count;
-}
 console.log(mul);
 
 const timeTotal = new Date().getTime() - timeFrom;

day6_plot.p8

@@ -0,0 +1,62 @@
+pico-8 cartridge // http://www.pico-8.com
+version 41
+__lua__
+
+local races = {
+  { 7, 9 },
+  { 15, 40 },
+  { 30, 200 }
+}
+
+printh("")
+printh("aoc 2023 6")
+printh("")
+
+function get_dist(race, t)
+  return (race[1] - t) * t
+end
+
+function trace()
+  line(1, 126, 127, 126, 13)
+  line(1, 126, 1, 1, 13)
+  print("distance", 3, 1, 8)
+  local x, y
+  for race in all(races) do
+    local md = 0 ym = 0 xm = 0 bt = 0 pd = 0
+    line(2, 126 - race[2] / 2, 127, 126 - race[2] / 2, 2)
+    print("time", 80, 114, 15)
+    print("pressed", 80, 121, 15)
+    line()
+    for i = 0, race[1] do
+      local dist = get_dist(race, i)
+      x = 1 + i * 4
+      y = 126 - dist / 2
+      if dist > md then
+        md = dist xm = x ym = y
+      end
+      line(x, y, 7)
+      yield()
+      if pd > dist and bt == 0 then bt = i - 1 end
+      pd = dist
+    end
+    print(md .. "MM", xm - 2, ym - 6, 8)
+    print(bt .. "MS", xm + 20, ym - 6, 15)
+    --	print(race[2],50,126-race[2]/2-6,2)
+  end
+end
+
+local co = cocreate(trace)
+
+cls()
+
+function _update()
+  coresume(co)
+end
+
+__gfx__
+00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00700700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00077000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00077000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00700700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000