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function findNthDigit(n: number): number {    if (n < 10) {        return n;    }    if (!data.length) {        init();    }
    const selected = data.find((v) => v.prev <= n && v.total > n);    // console.log(selected)    if (!selected) throw Error("accident not found");    const offset = n - selected.prev;    const current = selected.start + Math.floor(offset / selected.part);    // console.log(current)    return Number(String(current)[offset % selected.part]);}const data: Array<{    prev: number;    total: number;    part: number;    start: number;    end: number;}> = [];function init() {    let prev = 0;    let total = 10;    let part = 1;    let start = 0;
    let end = 10;    while (total <= (2 ** 31 - 1) * 10) {        data.push({ prev, total: total, part: part, start, end });
        part++;        start = end;        end *= 10;        prev = total;        total += part * (end - start);    }    // console.log(data)}
export default findNthDigit;