Give you a sequence and ask you the kth big number of a inteval.
The first line is the number of the test cases. For each test case, the first line contain two integer n and m (n, m <= 100000), indicates the number of integers in the sequence and the number of the quaere. The second line contains n integers, describe the sequence. Each of following m lines contains three integers s, t, k. [s, t] indicates the interval and k indicates the kth big number in interval [s, t]
For each test case, output m lines. Each line contains the kth big number.