Baipyrus/AoC-23
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try constrain directions

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Baipyrus 2024-01-27 23:57:41 +01:00
parent 2e6ace81b7
commit e6d4a79975
1 changed files with 16 additions and 1 deletions
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17
Day17/Part1.js
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@ -14,8 +14,17 @@ const input = readFileSync("input.txt")
g: 0, g: 0,
h: 0, h: 0,
p: null, p: null,
d: null
}))); })));
const man_dist = (a, b) => Math.abs(b.x - a.x) + Math.abs(b.y - a.y); const man_dist = (a, b) => Math.abs(b.x - a.x) + Math.abs(b.y - a.y);
const get_dir = (e) => {
const { d } = e;
if (!d) return e.c;
if (d.x === 1 && d.y === 0) return ">";
if (d.x === 0 && d.y === 1) return "v";
if (d.x === -1 && d.y === 0) return "<";
if (d.x === 0 && d.y === -1) return "^";
};
const start = input[0][0]; const start = input[0][0];
const end = input.slice(-1)[0].slice(-1)[0]; const end = input.slice(-1)[0].slice(-1)[0];
@ -46,17 +55,23 @@ while (open.length > 0) {
const next = input[ny][nx]; const next = input[ny][nx];
if (!next || closed.includes(next)) continue; if (!next || closed.includes(next)) continue;
const dir_check = current.d?.x === i && current.d?.y === j;
const direction = { x: i, y: j, c: dir_check ? (current?.c ?? 0) + 1 : 1 };
if (direction.c > 3) continue;
const nd = current.g + next.c; const nd = current.g + next.c;
if (open.includes(next)) { if (open.includes(next)) {
if (nd < next.g) { if (nd < next.g) {
next.g = nd; next.g = nd;
next.p = current; next.p = current;
next.d = direction;
} }
continue; continue;
} }
next.g = nd; next.g = nd;
next.p = current; next.p = current;
next.d = direction;
next.h = man_dist(next, end); next.h = man_dist(next, end);
open.push(next); open.push(next);
} }
@ -74,7 +89,7 @@ console.log(
.map(a => a .map(a => a
.map(b => shortest .map(b => shortest
.includes(b) ? .includes(b) ?
"*" : b.c get_dir(b) : b.c
).join("") ).join("")
).join("\n") ).join("\n")
); );