Package 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.<p>Medium</p> <p>You are given an array <code>arr</code> of positive integers. You are also given the array <code>queries</code> where <code>queries[i] = [left<sub>i,</sub> right<sub>i</sub>]</code>.</p> <p>For each query <code>i</code> compute the <strong>XOR</strong> of elements from <code>left<sub>i</sub></code> to <code>right<sub>i</sub></code> (that is, <code>arr[left<sub>i</sub>] XOR arr[left<sub>i</sub> + 1] XOR &hellip; XOR arr[right<sub>i</sub>]</code> ).</p> <p>Return an array <code>answer</code> where <code>answer[i]</code> is the answer to the <code>i<sup>th</sup></code> query.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> arr = [1,3,4,8], queries = [[0,1],[1,2],[0,3],[3,3]]</p> <p><strong>Output:</strong> [2,7,14,8]</p> <p><strong>Explanation:</strong></p> <p>The binary representation of the elements in the array are:</p> <p>1 = 0001</p> <p>3 = 0011</p> <p>4 = 0100</p> <p>8 = 1000</p> <p>The XOR values for queries are:</p> <p>[0,1] = 1 xor 3 = 2</p> <p>[1,2] = 3 xor 4 = 7</p> <p>[0,3] = 1 xor 3 xor 4 xor 8 = 14</p> <p>[3,3] = 8</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> arr = [4,8,2,10], queries = [[2,3],[1,3],[0,0],[0,3]]</p> <p><strong>Output:</strong> [8,0,4,4]</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= arr.length, queries.length <= 3 * 10<sup>4</sup></code></li> <li><code>1 <= arr[i] <= 10<sup>9</sup></code></li> <li><code>queries[i].length == 2</code></li> <li><code>0 <= left<sub>i</sub> <= right<sub>i</sub> < arr.length</code></li> </ul>

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • xorQueries

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