{ "data": { "question": { "questionId": "2276", "questionFrontendId": "2157", "boundTopicId": null, "title": "Groups of Strings", "titleSlug": "groups-of-strings", "content": "
You are given a 0-indexed array of strings words
. Each string consists of lowercase English letters only. No letter occurs more than once in any string of words
.
Two strings s1
and s2
are said to be connected if the set of letters of s2
can be obtained from the set of letters of s1
by any one of the following operations:
s1
.s1
.s1
with any letter, including itself.The array words
can be divided into one or more non-intersecting groups. A string belongs to a group if any one of the following is true:
Note that the strings in words
should be grouped in such a manner that a string belonging to a group cannot be connected to a string present in any other group. It can be proved that such an arrangement is always unique.
Return an array ans
of size 2
where:
ans[0]
is the maximum number of groups words
can be divided into, andans[1]
is the size of the largest group.\n
Example 1:
\n\n\nInput: words = ["a","b","ab","cde"]\nOutput: [2,3]\nExplanation:\n- words[0] can be used to obtain words[1] (by replacing 'a' with 'b'), and words[2] (by adding 'b'). So words[0] is connected to words[1] and words[2].\n- words[1] can be used to obtain words[0] (by replacing 'b' with 'a'), and words[2] (by adding 'a'). So words[1] is connected to words[0] and words[2].\n- words[2] can be used to obtain words[0] (by deleting 'b'), and words[1] (by deleting 'a'). So words[2] is connected to words[0] and words[1].\n- words[3] is not connected to any string in words.\nThus, words can be divided into 2 groups ["a","b","ab"] and ["cde"]. The size of the largest group is 3. \n\n\n
Example 2:
\n\n\nInput: words = ["a","ab","abc"]\nOutput: [1,3]\nExplanation:\n- words[0] is connected to words[1].\n- words[1] is connected to words[0] and words[2].\n- words[2] is connected to words[1].\nSince all strings are connected to each other, they should be grouped together.\nThus, the size of the largest group is 3.\n\n\n
\n
Constraints:
\n\n1 <= words.length <= 2 * 104
1 <= words[i].length <= 26
words[i]
consists of lowercase English letters only.words[i]
.Compiled with clang 11
using the latest C++ 20 standard.
Your code is compiled with level two optimization (-O2
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Most standard library headers are already included automatically for your convenience.
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