```
public class Solution
extends Object
```
679 - 24 Game\. Hard You are given an integer array `cards` of length `4`. You have four cards, each containing a number in the range `[1, 9]`. You should arrange the numbers on these cards in a mathematical expression using the operators `['+', '-', '*', '/']` and the parentheses `'('` and `')'` to get the value 24. You are restricted with the following rules: * The division operator `'/'` represents real division, not integer division. * For example, `4 / (1 - 2 / 3) = 4 / (1 / 3) = 12`. * Every operation done is between two numbers. In particular, we cannot use `'-'` as a unary operator. * For example, if `cards = [1, 1, 1, 1]`, the expression `"-1 - 1 - 1 - 1"` is **not allowed**. * You cannot concatenate numbers together * For example, if `cards = [1, 2, 1, 2]`, the expression `"12 + 12"` is not valid. Return `true` if you can get such expression that evaluates to `24`, and `false` otherwise. **Example 1:** **Input:** cards = [4,1,8,7] **Output:** true **Explanation:** (8-4) \* (7-1) = 24 **Example 2:** **Input:** cards = [1,2,1,2] **Output:** false **Constraints:** * `cards.length == 4` * `1 <= cards[i] <= 9`

public boolean judgePoint24(int[] nums)

Class Solution