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function decrypt(code: number[], k: number): number[] {    if (k === 0) return Array.from(code).fill(0);    if (k < 0) return decrypt(code.reverse(), -k).reverse();    const nums = [...code, ...code];    const presum: number[] = Array(nums.length + 1).fill(0);    nums.forEach((value, index) => {        presum[index + 1] = value + (presum[index]);    });    return code.map((_, i) => presum[i + k + 1] - presum[i + 1]);}export default decrypt;