import fs from 'node:fs';


const file = fs.readFileSync('./2025/inputs/2').toString();
const ranges = file.split(",")
let invalids = 0
for (const r of ranges) {
    const [first, last] = r.split("-")
    processRange(Number(first), Number(last))
}

function processRange(ogstart: number, ogend: number) {
    let start = ogstart
    let end = ogend
    let startDigitAmount = Math.floor(Math.log10(start))
    if ((startDigitAmount + 1) % 2 == 1) {
        start = 10 ** (startDigitAmount + 1)
        startDigitAmount++
    }
    let firstStartHalf = Math.floor(start / (10 ** Math.floor((startDigitAmount + 1) / 2)))

    let endDigitAmount = Math.floor(Math.log10(end))
    if ((endDigitAmount + 1) % 2 == 1) {
        end = (10 ** (endDigitAmount)) - 1
        endDigitAmount--
    }
    const firstEndHalf = Math.floor(end / (10 ** Math.floor((endDigitAmount + 1) / 2)))

    for (var i = firstStartHalf; i <= firstEndHalf; i++) {
        if (Math.floor(Math.log10(start)) % 2 == 0) {
            continue
        }
        const n = Number(i + "" + i)
        if (ogstart <= n && n <= ogend) {
            invalids += n
        }

    }

}

console.log(invalids)