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// @Title: 最优除法 (Optimal Division)
// @Author: 15816537946@163.com
// @Date: 2022-02-27 16:54:41
// @Runtime: 0 ms
// @Memory: 1.8 MB
func optimalDivision(nums []int) string {
    n := len(nums)
    if n == 1 {
        return strconv.Itoa(nums[0])
    }
    if n == 2 {
        return fmt.Sprintf("%d/%d", nums[0],nums[1])
    }

    ans := &strings.Builder{}
    ans.WriteString(fmt.Sprintf("%d/(%d", nums[0],nums[1]))
    for _, num := range nums[2:] {
        ans.WriteByte('/')
        ans.WriteString(strconv.Itoa(num))
    }
    ans.WriteByte(')')
    return ans.String()
}