Solution.ts

function subArrayRanges(nums: number[]): number {
    const n = nums.length;
    let res = 0;
    for (let i = 0; i < n - 1; i++) {
        let min = nums[i];
        let max = nums[i];
        for (let j = i + 1; j < n; j++) {
            min = Math.min(min, nums[j]);
            max = Math.max(max, nums[j]);
            res += max - min;
        }
    }
    return res;
}