Special Array With X Elements Greater Than or Equal X
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
2There are 2 values (3 and 5) that are greater than or equal to 2.
Example 2
Input
nums = [0,0]Output
-1No numbers fit the criteria for x.
Constraints
- 1 <= nums.length <= 100
- 0 <= nums[i] <= 1000