Time Limit: 10000 MS Memory Limit: 65536 K

## Description

Give you a sequence and ask you the kth big number of a inteval.
## Input

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]
## Output

For each test case, output m lines. Each line contains the kth big number.
## Sample Input

1
10 3
1 4 2 3 5 6 7 8 9 0
1 3 2
1 10 1
1 5 5
## Sample Output

2
0
5

## Source

The 3rd Baidu Cup Central China Invitational Programming Contest (Final)