_2085

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Published: Feb 20, 2024 License: MIT Imports: 1 Imported by: 0

README

统计出现过一次的公共字符串

给你两个字符串数组 words1 和 words2 ,请你返回在两个字符串数组中 都恰好出现一次 的字符串的数目。

示例 1:

输入:words1 = ["leetcode","is","amazing","as","is"], words2 = ["amazing","leetcode","is"]
输出:2
解释:
- "leetcode" 在两个数组中都恰好出现一次,计入答案。
- "amazing" 在两个数组中都恰好出现一次,计入答案。
- "is" 在两个数组中都出现过,但在 words1 中出现了 2 次,不计入答案。
- "as" 在 words1 中出现了一次,但是在 words2 中没有出现过,不计入答案。
所以,有 2 个字符串在两个数组中都恰好出现了一次。

示例 2:

输入:words1 = ["b","bb","bbb"], words2 = ["a","aa","aaa"]
输出:0
解释:没有字符串在两个数组中都恰好出现一次。

示例 3:

输入:words1 = ["a","ab"], words2 = ["a","a","a","ab"]
输出:1
解释:唯一在两个数组中都出现一次的字符串是 "ab" 。

提示:

  • 1 <= words1.length, words2.length <= 1000
  • 1 <= words1[i].length, words2[j].length <= 30
  • words1[i] 和 words2[j] 都只包含小写英文字母。

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