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export default class OrderedStream {    #store: Map<number, string>;    #ptr = 1;    #n: number;    constructor(n: number) {        this.#store = new Map();        this.#n = n;    }
    insert(idKey: number, value: string): string[] {        if (idKey > this.#n || idKey < 1) {            throw Error("range error");        }        this.#store.set(idKey, value);        if (this.#ptr === idKey && this.#store.has(idKey)) {            const res: string[] = [];            let i = this.#ptr;            for (; this.#store.has(i); i++) {                res.push(this.#store.get(i) || "");            }            this.#ptr = i;            return res;        }        return [];    }}