# XOR key

# XOR key

*Xorq* has invented an encryption algorithm which uses bitwise XOR operations extensively. This encryption algorithm uses a sequence of non-negative integers as its key. To implement this algorithm efficiently, *Xorq* needs to find maximum value of for given integers , and , such that, . Help *Xorq* implement this function.

For example, , , and . We test each for all values of between and inclusive:

```
j x[j] x[j]^4
1 3 7
2 5 1
3 9 13
```

Our maximum value is .

**Function Description**

Complete the *xorKey* function in the editor below. It should return an integer array where each value is the response to a query.

xorKey has the following parameters:

*x*: a list of integers*queries*: a two dimensional array where each element is an integer array that consists of for the query at indices and respectively.

**Input Format**

The first line contains an integer , the number of test cases.

The first line of each test case contains two space-separated integers and , the size of the integer array and the number of queries against the test case.

The next line contains space-separated integers .

Each of next lines describes a query which consists of three integers and .

**Constraints**

**Output Format**

For each query, print the maximum value for , such that, on a new line.

**Sample Input 0**

```
1
15 8
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
10 6 10
1023 7 7
33 5 8
182 5 10
181 1 13
5 10 15
99 8 9
33 10 14
```

**Sample Output 0**

```
13
1016
41
191
191
15
107
47
```

**Explanation 0**

First Query (10 6 10): . The maximum is .

Second Query (1023 7 7):

Third Query (33 5 8):

Fourth Query (182 5 10):