{ "data": { "question": { "questionId": "1058", "questionFrontendId": "1061", "categoryTitle": "Algorithms", "boundTopicId": 3302, "title": "Lexicographically Smallest Equivalent String", "titleSlug": "lexicographically-smallest-equivalent-string", "content": "
You are given two strings of the same length s1
and s2
and a string baseStr
.
We say s1[i]
and s2[i]
are equivalent characters.
s1 = "abc"
and s2 = "cde"
, then we have 'a' == 'c'
, 'b' == 'd'
, and 'c' == 'e'
.Equivalent characters follow the usual rules of any equivalence relation:
\n\n'a' == 'a'
.'a' == 'b'
implies 'b' == 'a'
.'a' == 'b'
and 'b' == 'c'
implies 'a' == 'c'
.For example, given the equivalency information from s1 = "abc"
and s2 = "cde"
, "acd"
and "aab"
are equivalent strings of baseStr = "eed"
, and "aab"
is the lexicographically smallest equivalent string of baseStr
.
Return the lexicographically smallest equivalent string of baseStr
by using the equivalency information from s1
and s2
.
\n
Example 1:
\n\n\nInput: s1 = "parker", s2 = "morris", baseStr = "parser"\nOutput: "makkek"\nExplanation: Based on the equivalency information in s1 and s2, we can group their characters as [m,p], [a,o], [k,r,s], [e,i].\nThe characters in each group are equivalent and sorted in lexicographical order.\nSo the answer is "makkek".\n\n\n
Example 2:
\n\n\nInput: s1 = "hello", s2 = "world", baseStr = "hold"\nOutput: "hdld"\nExplanation: Based on the equivalency information in s1 and s2, we can group their characters as [h,w], [d,e,o], [l,r].\nSo only the second letter 'o' in baseStr is changed to 'd', the answer is "hdld".\n\n\n
Example 3:
\n\n\nInput: s1 = "leetcode", s2 = "programs", baseStr = "sourcecode"\nOutput: "aauaaaaada"\nExplanation: We group the equivalent characters in s1 and s2 as [a,o,e,r,s,c], [l,p], [g,t] and [d,m], thus all letters in baseStr except 'u' and 'd' are transformed to 'a', the answer is "aauaaaaada".\n\n\n
\n
Constraints:
\n\n1 <= s1.length, s2.length, baseStr <= 1000
s1.length == s2.length
s1
, s2
, and baseStr
consist of lowercase English letters.给出长度相同的两个字符串s1
和 s2
,还有一个字符串 baseStr
。
其中 s1[i]
和 s2[i]
是一组等价字符。
s1 = \"abc\"
且 s2 = \"cde\"
,那么就有 'a' == 'c', 'b' == 'd', 'c' == 'e'
。等价字符遵循任何等价关系的一般规则:
\n\n'a' == 'a'
'a' == 'b'
则必定有 'b' == 'a'
'a' == 'b'
且 'b' == 'c'
就表明 'a' == 'c'
例如, s1 = \"abc\"
和 s2 = \"cde\"
的等价信息和之前的例子一样,那么 baseStr = \"eed\"
, \"acd\"
或 \"aab\"
,这三个字符串都是等价的,而 \"aab\"
是 baseStr
的按字典序最小的等价字符串
利用 s1
和 s2
的等价信息,找出并返回 baseStr
的按字典序排列最小的等价字符串。
\n\n
示例 1:
\n\n\n输入:s1 = \"parker\", s2 = \"morris\", baseStr = \"parser\"\n输出:\"makkek\"\n解释:根据\n\nA
和B 中的等价信息,
我们可以将这些字符分为[m,p]
,[a,o]
,[k,r,s]
,[e,i] 共 4 组
。每组中的字符都是等价的,并按字典序排列。所以答案是\"makkek\"
。\n
示例 2:
\n\n\n输入:s1 = \"hello\", s2 = \"world\", baseStr = \"hold\"\n输出:\"hdld\"\n解释:根据\n\nA
和B 中的等价信息,
我们可以将这些字符分为[h,w]
,[d,e,o]
,[l,r] 共 3 组
。所以只有 S 中的第二个字符'o'
变成'd',最后答案为
\"hdld\"
。\n
示例 3:
\n\n\n输入:s1 = \"leetcode\", s2 = \"programs\", baseStr = \"sourcecode\"\n输出:\"aauaaaaada\"\n解释:我们可以把 A 和 B 中的等价字符分为\n\n[a,o,e,r,s,c]
,[l,p]
,[g,t]
和[d,m] 共 4 组
,因此S
中除了'u'
和'd'
之外的所有字母都转化成了'a'
,最后答案为\"aauaaaaada\"
。\n
\n\n
提示:
\n\n1 <= s1.length, s2.length, baseStr <= 1000
s1.length == s2.length
s1
, s2
, and baseStr
仅由从 'a'
到 'z'
的小写英文字母组成。\\u7248\\u672c\\uff1a \\u7f16\\u8bd1\\u65f6\\uff0c\\u5c06\\u4f1a\\u91c7\\u7528 \\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\"],\"java\":[\"Java\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u88ab\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u5305\\u542b Pair \\u7c7b: https:\\/\\/docs.oracle.com\\/javase\\/8\\/javafx\\/api\\/javafx\\/util\\/Pair.html <\\/p>\"],\"python\":[\"Python\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u5e38\\u7528\\u5e93\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8 \\u5bfc\\u5165\\uff0c\\u5982\\uff1aarray<\\/a>, bisect<\\/a>, 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use-after-free<\\/code>\\u9519\\u8bef\\u3002<\\/p>\\r\\n\\r\\n
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