{ "data": { "question": { "questionId": "2177", "questionFrontendId": "2068", "categoryTitle": "Algorithms", "boundTopicId": 1095933, "title": "Check Whether Two Strings are Almost Equivalent", "titleSlug": "check-whether-two-strings-are-almost-equivalent", "content": "

Two strings word1 and word2 are considered almost equivalent if the differences between the frequencies of each letter from 'a' to 'z' between word1 and word2 is at most 3.

\n\n

Given two strings word1 and word2, each of length n, return true if word1 and word2 are almost equivalent, or false otherwise.

\n\n

The frequency of a letter x is the number of times it occurs in the string.

\n\n

 

\n

Example 1:

\n\n
\nInput: word1 = "aaaa", word2 = "bccb"\nOutput: false\nExplanation: There are 4 'a's in "aaaa" but 0 'a's in "bccb".\nThe difference is 4, which is more than the allowed 3.\n
\n\n

Example 2:

\n\n
\nInput: word1 = "abcdeef", word2 = "abaaacc"\nOutput: true\nExplanation: The differences between the frequencies of each letter in word1 and word2 are at most 3:\n- 'a' appears 1 time in word1 and 4 times in word2. The difference is 3.\n- 'b' appears 1 time in word1 and 1 time in word2. The difference is 0.\n- 'c' appears 1 time in word1 and 2 times in word2. The difference is 1.\n- 'd' appears 1 time in word1 and 0 times in word2. The difference is 1.\n- 'e' appears 2 times in word1 and 0 times in word2. The difference is 2.\n- 'f' appears 1 time in word1 and 0 times in word2. The difference is 1.\n
\n\n

Example 3:

\n\n
\nInput: word1 = "cccddabba", word2 = "babababab"\nOutput: true\nExplanation: The differences between the frequencies of each letter in word1 and word2 are at most 3:\n- 'a' appears 2 times in word1 and 4 times in word2. The difference is 2.\n- 'b' appears 2 times in word1 and 5 times in word2. The difference is 3.\n- 'c' appears 3 times in word1 and 0 times in word2. The difference is 3.\n- 'd' appears 2 times in word1 and 0 times in word2. The difference is 2.\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "检查两个字符串是否几乎相等", "translatedContent": "

如果两个字符串 word1 和 word2 中从 'a' 到 'z' 每一个字母出现频率之差都 不超过 3 ,那么我们称这两个字符串 word1 和 word2 几乎相等 。

\n\n

给你两个长度都为 n 的字符串 word1 和 word2 ,如果 word1 和 word2 几乎相等 ,请你返回 true ,否则返回 false 。

\n\n

一个字母 x 的出现 频率 指的是它在字符串中出现的次数。

\n\n

 

\n\n

示例 1:

\n\n
输入:word1 = \"aaaa\", word2 = \"bccb\"\n输出:false\n解释:字符串 \"aaaa\" 中有 4 个 'a' ,但是 \"bccb\" 中有 0 个 'a' 。\n两者之差为 4 ,大于上限 3 。\n
\n\n

示例 2:

\n\n
输入:word1 = \"abcdeef\", word2 = \"abaaacc\"\n输出:true\n解释:word1 和 word2 中每个字母出现频率之差至多为 3 :\n- 'a' 在 word1 中出现了 1 次,在 word2 中出现了 4 次,差为 3 。\n- 'b' 在 word1 中出现了 1 次,在 word2 中出现了 1 次,差为 0 。\n- 'c' 在 word1 中出现了 1 次,在 word2 中出现了 2 次,差为 1 。\n- 'd' 在 word1 中出现了 1 次,在 word2 中出现了 0 次,差为 1 。\n- 'e' 在 word1 中出现了 2 次,在 word2 中出现了 0 次,差为 2 。\n- 'f' 在 word1 中出现了 1 次,在 word2 中出现了 0 次,差为 1 。\n
\n\n

示例 3:

\n\n
输入:word1 = \"cccddabba\", word2 = \"babababab\"\n输出:true\n解释:word1 和 word2 中每个字母出现频率之差至多为 3 :\n- 'a' 在 word1 中出现了 2 次,在 word2 中出现了 4 次,差为 2 。\n- 'b' 在 word1 中出现了 2 次,在 word2 中出现了 5 次,差为 3 。\n- 'c' 在 word1 中出现了 3 次,在 word2 中出现了 0 次,差为 3 。\n- 'd' 在 word1 中出现了 2 次,在 word2 中出现了 0 次,差为 2 。\n
\n\n

 

\n\n

提示:

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