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export default function minSubArrayLen(target: number, nums: number[]): number {    const n = nums.length;    if (n === 0) {        return 0;    }    let ans = Infinity;    let start = 0;    let sum = 0;    for (let end = 0; end < n; end++) {        sum += nums[end];        while (sum >= target) {            ans = Math.min(ans, end - start + 1);            sum -= nums[start];            start++;        }    }    return ans === Infinity ? 0 : ans;}