Given a sorted array
A
of
unique
numbers, find the
K
-th
missing number starting from the leftmost number of the array.
Example 1:
Input: A = [4,7,9,10] , K = 1 Output: 5 Explanation: The first missing number is 5.
Example 2:
Input: A = [4,7,9,10] , K = 3 Output: 8 Explanation: The missing numbers are [5,6,8,...], hence the third missing number is 8.
Example 3:
Input: A = [1,2,4] , K = 3 Output: 6 Explanation: The missing numbers are [3,5,6,7,...], hence the third missing number is 6.
Note:
1 <= A.length <= 50000
1 <= A[i] <= 1e7
1 <= K <= 1e8