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export default function maxProduct(nums: number[]): number {    const max_pair = nums.reduce(        (a, v, i): [number, number] => v > a[1] ? [i, v] : a,        [0, nums[0]] as [number, number],    );
    nums.splice(max_pair[0], 1);    const sec_max_pair = nums.reduce(        (a, v, i): [number, number] => v > a[1] ? [i, v] : a,        [0, nums[0]] as [number, number],    );
    return (sec_max_pair[1] - 1) * (max_pair[1] - 1);}