Minimum Cost of Buying Candies With Discount.js

// Runtime: 85 ms (Top 68.97%) | Memory: 44.1 MB (Top 21.26%)
var minimumCost = function(cost) {
    if (cost.length < 3) {
        return cost.reduce((prev, cur) => prev + cur);
    }

    cost.sort((a, b) => b - a);
    let count = 0;
    let sum = 0;

    for (const num of cost) {
        if (count === 2) {
            count = 0;
            continue;
        }
        sum += num;
        count++;
    }

    return sum;
};