{ "data": { "question": { "questionId": "2300", "questionFrontendId": "2182", "categoryTitle": "Algorithms", "boundTopicId": 1274496, "title": "Construct String With Repeat Limit", "titleSlug": "construct-string-with-repeat-limit", "content": "
You are given a string s
and an integer repeatLimit
. Construct a new string repeatLimitedString
using the characters of s
such that no letter appears more than repeatLimit
times in a row. You do not have to use all characters from s
.
Return the lexicographically largest repeatLimitedString
possible.
A string a
is lexicographically larger than a string b
if in the first position where a
and b
differ, string a
has a letter that appears later in the alphabet than the corresponding letter in b
. If the first min(a.length, b.length)
characters do not differ, then the longer string is the lexicographically larger one.
\n
Example 1:
\n\n\nInput: s = "cczazcc", repeatLimit = 3\nOutput: "zzcccac"\nExplanation: We use all of the characters from s to construct the repeatLimitedString "zzcccac".\nThe letter 'a' appears at most 1 time in a row.\nThe letter 'c' appears at most 3 times in a row.\nThe letter 'z' appears at most 2 times in a row.\nHence, no letter appears more than repeatLimit times in a row and the string is a valid repeatLimitedString.\nThe string is the lexicographically largest repeatLimitedString possible so we return "zzcccac".\nNote that the string "zzcccca" is lexicographically larger but the letter 'c' appears more than 3 times in a row, so it is not a valid repeatLimitedString.\n\n\n
Example 2:
\n\n\nInput: s = "aababab", repeatLimit = 2\nOutput: "bbabaa"\nExplanation: We use only some of the characters from s to construct the repeatLimitedString "bbabaa". \nThe letter 'a' appears at most 2 times in a row.\nThe letter 'b' appears at most 2 times in a row.\nHence, no letter appears more than repeatLimit times in a row and the string is a valid repeatLimitedString.\nThe string is the lexicographically largest repeatLimitedString possible so we return "bbabaa".\nNote that the string "bbabaaa" is lexicographically larger but the letter 'a' appears more than 2 times in a row, so it is not a valid repeatLimitedString.\n\n\n
\n
Constraints:
\n\n1 <= repeatLimit <= s.length <= 105
s
consists of lowercase English letters.给你一个字符串 s
和一个整数 repeatLimit
,用 s
中的字符构造一个新字符串 repeatLimitedString
,使任何字母 连续 出现的次数都不超过 repeatLimit
次。你不必使用 s
中的全部字符。
返回 字典序最大的 repeatLimitedString
。
如果在字符串 a
和 b
不同的第一个位置,字符串 a
中的字母在字母表中出现时间比字符串 b
对应的字母晚,则认为字符串 a
比字符串 b
字典序更大 。如果字符串中前 min(a.length, b.length)
个字符都相同,那么较长的字符串字典序更大。
\n\n
示例 1:
\n\n输入:s = \"cczazcc\", repeatLimit = 3\n输出:\"zzcccac\"\n解释:使用 s 中的所有字符来构造 repeatLimitedString \"zzcccac\"。\n字母 'a' 连续出现至多 1 次。\n字母 'c' 连续出现至多 3 次。\n字母 'z' 连续出现至多 2 次。\n因此,没有字母连续出现超过 repeatLimit 次,字符串是一个有效的 repeatLimitedString 。\n该字符串是字典序最大的 repeatLimitedString ,所以返回 \"zzcccac\" 。\n注意,尽管 \"zzcccca\" 字典序更大,但字母 'c' 连续出现超过 3 次,所以它不是一个有效的 repeatLimitedString 。\n\n\n
示例 2:
\n\n输入:s = \"aababab\", repeatLimit = 2\n输出:\"bbabaa\"\n解释:\n使用 s 中的一些字符来构造 repeatLimitedString \"bbabaa\"。 \n字母 'a' 连续出现至多 2 次。 \n字母 'b' 连续出现至多 2 次。 \n因此,没有字母连续出现超过 repeatLimit 次,字符串是一个有效的 repeatLimitedString 。 \n该字符串是字典序最大的 repeatLimitedString ,所以返回 \"bbabaa\" 。 \n注意,尽管 \"bbabaaa\" 字典序更大,但字母 'a' 连续出现超过 2 次,所以它不是一个有效的 repeatLimitedString 。\n\n\n
\n\n
提示:
\n\n1 <= repeatLimit <= s.length <= 105
s
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out-of-bounds<\\/code>\\u548c
use-after-free<\\/code>\\u9519\\u8bef\\u3002<\\/p>\\r\\n\\r\\n
OpenJDK 17<\\/code>\\u3002\\u53ef\\u4ee5\\u4f7f\\u7528Java 8\\u7684\\u7279\\u6027\\u4f8b\\u5982\\uff0clambda expressions \\u548c stream API\\u3002<\\/p>\\r\\n\\r\\n
Python 2.7.12<\\/code><\\/p>\\r\\n\\r\\n
GCC 8.2<\\/code>\\uff0c\\u91c7\\u7528GNU99\\u6807\\u51c6\\u3002<\\/p>\\r\\n\\r\\n
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out-of-bounds<\\/code>\\u548c
use-after-free<\\/code>\\u9519\\u8bef\\u3002<\\/p>\\r\\n\\r\\n
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