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Author SHA1 Message Date
Gleb Koval ec23232f15
Day 7 2023-12-07 05:45:05 +00:00
Gleb Koval f4dd59594a
Rename days 4-6 (main -> solution) 2023-12-06 20:57:46 +00:00
8 changed files with 1100 additions and 2 deletions

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@ -1,5 +1,8 @@
{ {
"deno.enable": true, "deno.enable": true,
"deno.lint": true, "deno.lint": true,
"deno.unstable": false "deno.unstable": false,
"deno.enablePaths": [
"./day3"
]
} }

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@ -32,3 +32,8 @@ I'll probably try to vary languages a bit to get some variety.
### [Day 6](day6/) ### [Day 6](day6/)
**Language**: Haskell **Language**: Haskell
### [Day 7](day7/)
**Language**: JavaScript (Node)
**Note**: Yes, I used JSDoc for type-hints. But I think only insane people use JavaScript without JSDoc.

5
day7/eg.txt Normal file
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@ -0,0 +1,5 @@
32T3K 765
T55J5 684
KK677 28
KTJJT 220
QQQJA 483

1000
day7/input.txt Normal file

File diff suppressed because it is too large Load Diff

85
day7/solution.js Normal file
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@ -0,0 +1,85 @@
const fs = require("fs/promises");
const order = ["A", "K", "Q", "J", "T", "9", "8", "7", "6", "5", "4", "3", "2"];
const newOrder = ["A", "K", "Q", "T", "9", "8", "7", "6", "5", "4", "3", "2", "J"];
/**
* @param {string[]} hand
* @param {boolean} useJoker
*/
function handType(hand, useJoker = false) {
function eq(v) {
return c => c === v || useJoker && c === "J";
}
const s = new Set(useJoker ? hand.filter(c => c !== "J") : hand);
if (s.size === 1 || s.size === 0) { // 0 if JJJJJ and useJoker == true
return 0;
} else if (s.size === 2) {
let m = -1;
for (const v of s.values()) {
const count = hand.filter(eq(v)).length;
if (count > m) m = count;
}
if (m === 4) {
return 1;
}
return 2;
} else if (s.size === 3) {
let m = -1;
for (const v of s.values()) {
const count = hand.filter(eq(v)).length;
if (count > m) m = count;
}
if (m === 3) {
return 3;
}
return 4;
} else if (s.size === 4) {
return 5;
}
return 6;
}
/**
* @param {string[]} h1
* @param {string[]} h2
* @param {boolean} useJoker
*/
function cmpHands(h1, h2, useJoker = false) {
const [t1, t2] = [handType(h1, useJoker), handType(h2, useJoker)];
if (t1 !== t2) return t1 - t2;
for (let idx = 0; idx < h1.length; idx++) {
const [v1, v2] = [h1[idx], h2[idx]];
if (v1 !== v2) {
return useJoker ? newOrder.indexOf(v1) - newOrder.indexOf(v2)
: order.indexOf(v1) - order.indexOf(v2);
}
}
return 0;
}
/**
* @param {{hand: string[], bid: number}[]} hands
*/
function totalWinnings(hands) {
return hands.map((h, idx) => h.bid * (idx + 1))
.reduce((p, c) => p + c)
}
async function main() {
const lines = await fs.readFile("input.txt", {encoding: "utf8"})
.then(s => s.split("\n"));
const hands = lines.map(l => {
const [h, b] = l.split(" ");
return {
hand: h.split(""),
bid: Number(b)
};
});
hands.sort((h1, h2) => cmpHands(h2.hand, h1.hand));
console.log("Part 1:", totalWinnings(hands));
hands.sort((h1, h2) => cmpHands(h2.hand, h1.hand, true));
console.log("Part 2:", totalWinnings(hands));
}
main();