{ "data": { "question": { "questionId": "1281", "questionFrontendId": "1177", "categoryTitle": "Algorithms", "boundTopicId": 24022, "title": "Can Make Palindrome from Substring", "titleSlug": "can-make-palindrome-from-substring", "content": "

You are given a string s and array queries where queries[i] = [lefti, righti, ki]. We may rearrange the substring s[lefti...righti] for each query and then choose up to ki of them to replace with any lowercase English letter.

\n\n

If the substring is possible to be a palindrome string after the operations above, the result of the query is true. Otherwise, the result is false.

\n\n

Return a boolean array answer where answer[i] is the result of the ith query queries[i].

\n\n

Note that each letter is counted individually for replacement, so if, for example s[lefti...righti] = "aaa", and ki = 2, we can only replace two of the letters. Also, note that no query modifies the initial string s.

\n\n

 

\n

Example :

\n\n
\nInput: s = "abcda", queries = [[3,3,0],[1,2,0],[0,3,1],[0,3,2],[0,4,1]]\nOutput: [true,false,false,true,true]\nExplanation:\nqueries[0]: substring = "d", is palidrome.\nqueries[1]: substring = "bc", is not palidrome.\nqueries[2]: substring = "abcd", is not palidrome after replacing only 1 character.\nqueries[3]: substring = "abcd", could be changed to "abba" which is palidrome. Also this can be changed to "baab" first rearrange it "bacd" then replace "cd" with "ab".\nqueries[4]: substring = "abcda", could be changed to "abcba" which is palidrome.\n
\n\n

Example 2:

\n\n
\nInput: s = "lyb", queries = [[0,1,0],[2,2,1]]\nOutput: [false,true]\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "构建回文串检测", "translatedContent": "

给你一个字符串 s,请你对 s 的子串进行检测。

\n\n

每次检测,待检子串都可以表示为 queries[i] = [left, right, k]。我们可以 重新排列 子串 s[left], ..., s[right],并从中选择 最多 k 项替换成任何小写英文字母。 

\n\n

如果在上述检测过程中,子串可以变成回文形式的字符串,那么检测结果为 true,否则结果为 false

\n\n

返回答案数组 answer[],其中 answer[i] 是第 i 个待检子串 queries[i] 的检测结果。

\n\n

注意:在替换时,子串中的每个字母都必须作为 独立的 项进行计数,也就是说,如果 s[left..right] = "aaa" 且 k = 2,我们只能替换其中的两个字母。(另外,任何检测都不会修改原始字符串 s,可以认为每次检测都是独立的)

\n\n

 

\n\n

示例:

\n\n
输入:s = "abcda", queries = [[3,3,0],[1,2,0],[0,3,1],[0,3,2],[0,4,1]]\n输出:[true,false,false,true,true]\n解释:\nqueries[0] : 子串 = "d",回文。\nqueries[1] : 子串 = "bc",不是回文。\nqueries[2] : 子串 = "abcd",只替换 1 个字符是变不成回文串的。\nqueries[3] : 子串 = "abcd",可以变成回文的 "abba"。 也可以变成 "baab",先重新排序变成 "bacd",然后把 "cd" 替换为 "ab"。\nqueries[4] : 子串 = "abcda",可以变成回文的 "abcba"。\n
\n\n

 

\n\n

提示:

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(listof (listof exact-integer?)) (listof boolean?))\n\n )", "__typename": "CodeSnippetNode" }, { "lang": "Erlang", "langSlug": "erlang", "code": "-spec can_make_pali_queries(S :: unicode:unicode_binary(), Queries :: [[integer()]]) -> [boolean()].\ncan_make_pali_queries(S, Queries) ->\n .", "__typename": "CodeSnippetNode" }, { "lang": "Elixir", "langSlug": "elixir", "code": "defmodule Solution do\n @spec can_make_pali_queries(s :: String.t, queries :: [[integer]]) :: [boolean]\n def can_make_pali_queries(s, queries) do\n\n end\nend", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"6.8K\", \"totalSubmission\": \"24.6K\", \"totalAcceptedRaw\": 6763, \"totalSubmissionRaw\": 24578, \"acRate\": \"27.5%\"}", "hints": [ "Since we can rearrange the substring, all we care about is the frequency of each character in that substring.", "How to find the character frequencies efficiently ?", "As a preprocess, calculate the accumulate frequency of all characters for all prefixes of the string.", "How to check if a substring can be changed to a palindrome given its characters frequency ?", "Count the number of odd frequencies, there can be at most one odd frequency in a palindrome." ], "solution": null, "status": null, "sampleTestCase": "\"abcda\"\n[[3,3,0],[1,2,0],[0,3,1],[0,3,2],[0,4,1]]", "metaData": "{\n \"name\": \"canMakePaliQueries\",\n \"params\": [\n {\n \"name\": \"s\",\n \"type\": \"string\"\n },\n {\n \"type\": \"integer[][]\",\n \"name\": \"queries\"\n }\n ],\n \"return\": {\n \"type\": \"list\"\n },\n \"manual\": false\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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