Class Solution
Medium
You are given a binary string s
, and a 2D integer array queries
where queries[i] = [firsti, secondi]
.
For the ith
query, find the shortest substring of s
whose decimal value , val
, yields secondi
when bitwise XORed with firsti
. In other words, val ^ firsti == secondi
.
The answer to the ith
query is the endpoints ( 0-indexed ) of the substring [lefti, righti]
or [-1, -1]
if no such substring exists. If there are multiple answers, choose the one with the minimum lefti
.
Return an array ans
where ans[i] = [lefti, righti]
is the answer to the ith
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:
1 <= s.length <= 104
s[i]
is either'0'
or'1'
.1 <= queries.length <= 105
0 <= firsti, secondi <= 109
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint[][]
substringXorQueries
(java.lang.String s, int[][] queries) Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
-
Constructor Details
-
Solution
public Solution()
-
-
Method Details
-
substringXorQueries
public int[][] substringXorQueries(java.lang.String s, int[][] queries)
-