findMaxGroup.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    function findMaxGroup(arr) {
        if (!arr) return 0
        if (arr.length <= 2) return Math.min(arr[0], arr[1])
        let temp = [],
            res = [],
            max = 0,
            k = 1;
        res[0] = Math.min(arr[0], arr[1])
        for (let i = 3; i < arr.length; i += 2) {
            for (let j = 0; j < i; j++) {
                for (let n = j + 1; n <= i; n++) {
                    temp.push([arr[j], arr[n]])
                }
            }
            for (let i = 0; i < temp.length; i++) {
                max = Math.max(max, Math.min.apply(null, temp[i]))
            }
            res[k] = max + res[k - 1]
            temp = []
            max = 0
            k++
        }
        return res[res.length - 1]
    }

    console.log(findMaxGroup([1, 4, 3, 2, 7, 5]))
</script>
</body>
</html>