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25.js
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25.js
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// Total duration: 10 min (rounded to the nearest minute)
// Started at: 10:35
// First star at: 10:45
// Second star at: 10:45
const solveProblem = (data) => {
// Parse data
const lines = data.split("\n").slice(0, -1);
// Part 1
let result = 0;
lines.forEach(line => {
let num = 0;
line.split("").forEach((char, i) => {
num += {"=": -2, "-": -1, "0": 0, "1": 1, "2": 2}[char] * Math.pow(5, line.length - i - 1)
})
// console.log(num);
result += num;
})
const toSNAFU = (num, acc = "") => {
if (num == 0) {
return acc
}
switch (num % 5) {
case 0:
return toSNAFU(num / 5, "0" + acc);
case 1:
return toSNAFU((num - 1) / 5, "1" + acc);
case 2:
return toSNAFU((num - 2) / 5, "2" + acc);
case 3:
return toSNAFU((num + 2) / 5, "=" + acc);
case 4:
return toSNAFU((num + 1) / 5, "-" + acc);
}
}
console.log("result:", toSNAFU(result));
console.log("");
// Part 2
console.log("");
};
// Library code
const fs = require("fs");
const path = require('path');
const day = path.parse(__filename).name;
const files = [
`${day}-test`,
`${day}`,
];
files.forEach(file => {
fs.readFile(`./${file}.txt`, "utf8", (_, data) => {
console.log(`Data from file ${file}.txt`);
solveProblem(data);
});
});