2564 - Substring XOR Queries\.

Medium

You are given a binary string s, and a 2D integer array queries where <code>queriesi = first_i, second_i</code>.

For the <code>i^th</code> query, find the shortest substring of s whose decimal value , val, yields <code>second_i</code> when bitwise XORed with <code>first_i</code>. In other words, <code>val ^ first_i == second_i</code>.

The answer to the <code>i^th</code> query is the endpoints ( 0-indexed ) of the substring <code>left_i, right_i</code> or [-1, -1] if no such substring exists. If there are multiple answers, choose the one with the minimum <code>left_i</code>.

Return an array ans where <code>ansi = left_i, right_i</code> is the answer to the <code>i^th</code> query.

A substring is a contiguous non-empty sequence of characters within a string.

Example 1:

Input: s = "101101", queries = \[\[0,5],1,2]

Output: [0,2,2,3]

Explanation: For the first query the substring in range [0,2] is "101" which has a decimal value of **5 ** , and **5 ^ 0 = 5 ** , hence the answer to the first query is [0,2]. In the second query, the substring in range [2,3] is **"11", ** and has a decimal value of 3 , and **3 ^ 1 = 2 **. So, [2,3] is returned for the second query.

Example 2:

Input: s = "0101", queries = \[\[12,8]]

Output: [-1,-1]

Explanation: In this example there is no substring that answers the query, hence [-1,-1] is returned.

Example 3:

Input: s = "1", queries = \[\[4,5]]

Output: [0,0]

Explanation: For this example, the substring in range [0,0] has a decimal value of **1 ** , and **1 ^ 4 = 5 **. So, the answer is [0,0].

Constraints:

• <code>1 <= s.length <= 10⁴</code>

• s[i] is either '0' or '1'.

• <code>1 <= queries.length <= 10⁵</code>

• <code>0 <= first_i, second_i<= 10⁹</code>