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export default function ProductOfNumbers() {    const array = [1];
    return {        add(num: number): void {            if (num === 0) {                array[0] = 1;                array.length = 1;            } else {                array.push(num * array[array.length - 1]);            }        },
        getProduct(k: number): number {            if (k > array.length - 1) return 0;            return array[array.length - 1] / array[array.length - 1 - k];        },    };}