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export default function closestToTarget(arr: number[], target: number): number {    const temp: number[] = [];
    for (const n of arr) {        if (temp.length) {            const last = temp[temp.length - 1];            if (last !== n) {                temp.push(n);            }        } else {            temp.push(n);        }    }
    arr = temp;
    let ans = Math.abs(arr[0] - target);
    let valid = Array.of(arr[0]);
    for (const num of arr) {        const tv = new Set([num, ...valid.map((x) => x & num)]);        valid = Array.from(tv);
        ans = Math.min(ans, ...valid.map((x) => Math.abs(x - target)));    }    return ans;}