36 lines
936 B
JavaScript
36 lines
936 B
JavaScript
const { Glib } = require('../../lib');
|
|
|
|
module.exports = {
|
|
'1': (input) =>
|
|
Glib.fromLines(input)
|
|
.map((boxId) => new Set(boxId.characterFrequencies.values()))
|
|
.reduce(
|
|
([two, three], counts) => [
|
|
two + (counts.has(2n) ? 1n : 0n),
|
|
three + (counts.has(3n) ? 1n : 0n),
|
|
],
|
|
[0n, 0n],
|
|
)
|
|
.glib.product(),
|
|
'2': (input) => {
|
|
const boxIds = Glib.fromLines(input).map(
|
|
(boxId) =>
|
|
Glib.fromSequence(0, boxId.length - 1).map((i) =>
|
|
boxId.splice(Number(i), 1),
|
|
).array,
|
|
).array;
|
|
for (let i = 0; i < boxIds.length; i++) {
|
|
const left = boxIds[i];
|
|
for (let j = i + 1; j < boxIds.length; j++) {
|
|
const right = boxIds[j];
|
|
for (let k = 0; k < left.length; k++) {
|
|
if (left[k] === right[k]) {
|
|
return left[k];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
throw new Error('no solution');
|
|
},
|
|
};
|