Array of n integers is given. Find its k-th element in decreasing order.
First line contains the number of elements n (1 ≤ n ≤ 10^5
) in array, and integer k(1 ≤ k ≤ 10^5
). Second line contains n integers, not greater than 10^9
by absolute value.
Print the k-th element of array sorted in decreasing order, or -1 if such element does not exist.