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class AllOne {    #count_to_strings: Record<string | number, Set<string> | undefined> = {};
    #string_to_count = new Map<string, number>();    inc(key: string): void {        const count = this.#string_to_count.get(key) || 0;        if (this.#string_to_count.has(key) && count) {            this.#string_to_count.set(key, count + 1);        } else {            this.#string_to_count.set(key, 1);        }        this.#count_to_strings[count]?.delete(key);        let set = this.#count_to_strings[count + 1];        if (!set) {            set = new Set<string>();            this.#count_to_strings[count + 1] = set;        }        set.add(key);        if (this.#count_to_strings[count]?.size === 0) {            Reflect.deleteProperty(this.#count_to_strings, count);        }    }
    dec(key: string): void {        const count = this.#string_to_count.get(key) || 0;        if (count === 0) {            return;        }        if (this.#string_to_count.has(key) && count) {            this.#string_to_count.set(key, count - 1);        }        if (count === 1) this.#string_to_count.delete(key);
        this.#count_to_strings[count]?.delete(key);        if (count - 1 > 0) {            let set = this.#count_to_strings[count - 1];            if (!set) {                set = new Set<string>();                this.#count_to_strings[count - 1] = set;            }            set.add(key);        }        if (this.#count_to_strings[count]?.size === 0) {            Reflect.deleteProperty(this.#count_to_strings, count);        }    }
    getMaxKey(): string {        const num = Object.keys(this.#count_to_strings).at(-1);        if (typeof num === "undefined") return "";        const set = this.#count_to_strings[num];        if (set) {            for (const key of set) {                return key;            }        }        return "";    }
    getMinKey(): string {        const num = Object.keys(this.#count_to_strings).at(0);        if (typeof num === "undefined") return "";        const set = this.#count_to_strings[num];
        if (set) {            for (const key of set) {                return key;            }        }
        return "";    }}export default AllOne;