Solution (leetcode-in-java 1.23 API)

java.lang.Object
- g1601_1700.s1608_special_array_with_x_elements_greater_than_or_equal_x.Solution

```
public class Solution
extends Object
```
1608 - Special Array With X Elements Greater Than or Equal X.
Easy

You are given an array nums of non-negative integers. nums is considered special if there exists a number x such that there are exactly x numbers in nums that are greater than or equal to x.

Notice that x does not have to be an element in nums.

Return x if the array is special , otherwise, return -1. It can be proven that if nums is special, the value for x is unique.

Example 1:

Input: nums = [3,5]

Output: 2

Explanation: There are 2 values (3 and 5) that are greater than or equal to 2.

Example 2:

Input: nums = [0,0]

Output: -1

Explanation: No numbers fit the criteria for x.

If x = 0, there should be 0 numbers >= x, but there are 2.

If x = 1, there should be 1 number >= x, but there are 0.

If x = 2, there should be 2 numbers >= x, but there are 0.

x cannot be greater since there are only 2 numbers in nums.

Example 3:

Input: nums = [0,4,3,0,4]

Output: 3

Explanation: There are 3 values that are greater than or equal to 3.

Constraints:
- 1 <= nums.length <= 100
- 0 <= nums[i] <= 1000

- Constructor Summary
  
  Constructors
  Constructor Description
  
  Solution()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  int specialArray(int[] nums)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- Solution
```
public Solution()
```

Method Detail

specialArray

public int specialArray(int[] nums)