g1301_1400.s1310_xor_queries_of_a_subarray

Class Solution

java.lang.Object

g1301_1400.s1310_xor_queries_of_a_subarray.Solution

public class Solution
extends Object

1310 - XOR Queries of a Subarray.

Medium

You are given an array arr of positive integers. You are also given the array queries where queries[i] = [lefti, righti].

For each query i compute the XOR of elements from lefti to righti (that is, arr[lefti] XOR arr[lefti + 1] XOR … XOR arr[righti] ).

Return an array answer where answer[i] is the answer to the ith query.

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:

• 1 <= arr.length, queries.length <= 3 * 104
• 1 <= arr[i] <= 109
• queries[i].length == 2
• 0 <= lefti <= righti < arr.length

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int[]	xorQueries(int[] a, int[][] queries)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

xorQueries

public int[] xorQueries(int[] a,
                        int[][] queries)