{ "data": { "question": { "questionId": "2494", "questionFrontendId": "2416", "categoryTitle": "Algorithms", "boundTopicId": 1827110, "title": "Sum of Prefix Scores of Strings", "titleSlug": "sum-of-prefix-scores-of-strings", "content": "
You are given an array words
of size n
consisting of non-empty strings.
We define the score of a string word
as the number of strings words[i]
such that word
is a prefix of words[i]
.
words = ["a", "ab", "abc", "cab"]
, then the score of "ab"
is 2
, since "ab"
is a prefix of both "ab"
and "abc"
.Return an array answer
of size n
where answer[i]
is the sum of scores of every non-empty prefix of words[i]
.
Note that a string is considered as a prefix of itself.
\n\n\n
Example 1:
\n\n\nInput: words = ["abc","ab","bc","b"]\nOutput: [5,4,3,2]\nExplanation: The answer for each string is the following:\n- "abc" has 3 prefixes: "a", "ab", and "abc".\n- There are 2 strings with the prefix "a", 2 strings with the prefix "ab", and 1 string with the prefix "abc".\nThe total is answer[0] = 2 + 2 + 1 = 5.\n- "ab" has 2 prefixes: "a" and "ab".\n- There are 2 strings with the prefix "a", and 2 strings with the prefix "ab".\nThe total is answer[1] = 2 + 2 = 4.\n- "bc" has 2 prefixes: "b" and "bc".\n- There are 2 strings with the prefix "b", and 1 string with the prefix "bc".\nThe total is answer[2] = 2 + 1 = 3.\n- "b" has 1 prefix: "b".\n- There are 2 strings with the prefix "b".\nThe total is answer[3] = 2.\n\n\n
Example 2:
\n\n\nInput: words = ["abcd"]\nOutput: [4]\nExplanation:\n"abcd" has 4 prefixes: "a", "ab", "abc", and "abcd".\nEach prefix has a score of one, so the total is answer[0] = 1 + 1 + 1 + 1 = 4.\n\n\n
\n
Constraints:
\n\n1 <= words.length <= 1000
1 <= words[i].length <= 1000
words[i]
consists of lowercase English letters.给你一个长度为 n
的数组 words
,该数组由 非空 字符串组成。
定义字符串 word
的 分数 等于以 word
作为 前缀 的 words[i]
的数目。
words = [\"a\", \"ab\", \"abc\", \"cab\"]
,那么 \"ab\"
的分数是 2
,因为 \"ab\"
是 \"ab\"
和 \"abc\"
的一个前缀。返回一个长度为 n
的数组 answer
,其中 answer[i]
是 words[i]
的每个非空前缀的分数 总和 。
注意:字符串视作它自身的一个前缀。
\n\n\n\n
示例 1:
\n\n输入:words = [\"abc\",\"ab\",\"bc\",\"b\"]\n输出:[5,4,3,2]\n解释:对应每个字符串的答案如下:\n- \"abc\" 有 3 个前缀:\"a\"、\"ab\" 和 \"abc\" 。\n- 2 个字符串的前缀为 \"a\" ,2 个字符串的前缀为 \"ab\" ,1 个字符串的前缀为 \"abc\" 。\n总计 answer[0] = 2 + 2 + 1 = 5 。\n- \"ab\" 有 2 个前缀:\"a\" 和 \"ab\" 。\n- 2 个字符串的前缀为 \"a\" ,2 个字符串的前缀为 \"ab\" 。\n总计 answer[1] = 2 + 2 = 4 。\n- \"bc\" 有 2 个前缀:\"b\" 和 \"bc\" 。\n- 2 个字符串的前缀为 \"b\" ,1 个字符串的前缀为 \"bc\" 。 \n总计 answer[2] = 2 + 1 = 3 。\n- \"b\" 有 1 个前缀:\"b\"。\n- 2 个字符串的前缀为 \"b\" 。\n总计 answer[3] = 2 。\n\n\n
示例 2:
\n\n输入:words = [\"abcd\"]\n输出:[4]\n解释:\n\"abcd\" 有 4 个前缀 \"a\"、\"ab\"、\"abc\" 和 \"abcd\"。\n每个前缀的分数都是 1 ,总计 answer[0] = 1 + 1 + 1 + 1 = 4 。\n\n\n
\n\n
提示:
\n\n1 <= words.length <= 1000
1 <= words[i].length <= 1000
words[i]
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