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1310. XOR Queries of a Subarray

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Description

Given the array arr of positive integers and the array queries where queries[i] = [Li, Ri], for each query i compute the XOR of elements from Li to Ri (that is, arr[Li] xor arr[Li+1] xor ... xor arr[Ri] ). Return an array containing the result for the given queries.

 

Example 1:

Input: arr = [1,3,4,8], queries = [[0,1],[1,2],[0,3],[3,3]]

Output: [2,7,14,8] 

Explanation: 

The binary representation of the elements in the array are:

1 = 0001 

3 = 0011 

4 = 0100 

8 = 1000 

The XOR values for queries are:

[0,1] = 1 xor 3 = 2 

[1,2] = 3 xor 4 = 7 

[0,3] = 1 xor 3 xor 4 xor 8 = 14 

[3,3] = 8

Example 2:

Input: arr = [4,8,2,10], queries = [[2,3],[1,3],[0,0],[0,3]]

Output: [8,0,4,4]

 

Constraints:

<li><code>1 &lt;= arr.length &lt;= 3 *&nbsp;10^4</code></li>

<li><code>1 &lt;= arr[i] &lt;= 10^9</code></li>

<li><code>1 &lt;= queries.length &lt;= 3 * 10^4</code></li>

<li><code>queries[i].length == 2</code></li>

<li><code>0 &lt;= queries[i][0] &lt;= queries[i][1] &lt; arr.length</code></li>

Solutions

Python3

Java

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