{ "data": { "question": { "questionId": "2165", "questionFrontendId": "2055", "boundTopicId": null, "title": "Plates Between Candles", "titleSlug": "plates-between-candles", "content": "
There is a long table with a line of plates and candles arranged on top of it. You are given a 0-indexed string s
consisting of characters '*'
and '|'
only, where a '*'
represents a plate and a '|'
represents a candle.
You are also given a 0-indexed 2D integer array queries
where queries[i] = [lefti, righti]
denotes the substring s[lefti...righti]
(inclusive). For each query, you need to find the number of plates between candles that are in the substring. A plate is considered between candles if there is at least one candle to its left and at least one candle to its right in the substring.
s = "||**||**|*"
, and a query [3, 8]
denotes the substring "*||**|"
. The number of plates between candles in this substring is 2
, as each of the two plates has at least one candle in the substring to its left and right.Return an integer array answer
where answer[i]
is the answer to the ith
query.
\n
Example 1:
\n\n\nInput: s = "**|**|***|", queries = [[2,5],[5,9]]\nOutput: [2,3]\nExplanation:\n- queries[0] has two plates between candles.\n- queries[1] has three plates between candles.\n\n\n
Example 2:
\n\n\nInput: s = "***|**|*****|**||**|*", queries = [[1,17],[4,5],[14,17],[5,11],[15,16]]\nOutput: [9,0,0,0,0]\nExplanation:\n- queries[0] has nine plates between candles.\n- The other queries have zero plates between candles.\n\n\n
\n
Constraints:
\n\n3 <= s.length <= 105
s
consists of '*'
and '|'
characters.1 <= queries.length <= 105
queries[i].length == 2
0 <= lefti <= righti < s.length
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Most standard library headers are already included automatically for your convenience.
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