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export default function breakfastNumber(    staple: number[],    drinks: number[],    x: number,): number {    staple.sort((a, b) => a - b);    drinks.sort((a, b) => a - b);
    let i = 0;    let j = drinks.length - 1;
    while (drinks[j] >= x) {        j--;    }    let res = 0;    while (i < staple.length && j >= 0) {        if (staple[i] >= x) break;
        if (staple[i] + drinks[j] <= x) {            res += j + 1;            i++;        } else {            j--;        }    }    return res % 1000000007;}