import { promises as fsp } from "node:fs";

async function asyncReadFile(filename) {
    try {
        const contents = await fsp.readFile(filename, "utf-8");

        return contents.trim();
    } catch (err) {
        console.error(err);
    }
}

const findHighestOutput = (bank) => {
    let arr = Array.from(bank);
    let highest = 0;
    arr.forEach((val, idx) => {
        if (arr.length === idx + 1) return;
        for (let i = idx + 1; i < arr.length; i++) {
            const output = `${val}${arr[i]}` * 1;
            if (output > highest) highest = output;
        }
    });
    console.log(highest);
    return highest;
};

/*
const dataToParse = `987654321111111
811111111111119
234234234234278
818181911112111`;
*/

const dataToParse = await asyncReadFile("../input.txt");

const banks = dataToParse.split("\n");
let total = 0;

banks.forEach((bank) => {
    total += findHighestOutput(bank);
});

console.log(`Total: ${total}`);