The beauty of a string is the difference in frequencies between the most frequent and least frequent characters.
\n\n"abaacc" is 3 - 1 = 2.Given a string s, return the sum of beauty of all of its substrings.
\n
Example 1:
\n\n\nInput: s = "aabcb"\nOutput: 5\nExplanation: The substrings with non-zero beauty are ["aab","aabc","aabcb","abcb","bcb"], each with beauty equal to 1.\n\n
Example 2:
\n\n\nInput: s = "aabcbaa"\nOutput: 17\n\n\n
\n
Constraints:
\n\n1 <= s.length <= 500s consists of only lowercase English letters.一个字符串的 美丽值 定义为：出现频率最高字符与出现频率最低字符的出现次数之差。
\n\n\"abaacc\" 的美丽值为 3 - 1 = 2 。给你一个字符串 s ，请你返回它所有子字符串的 美丽值 之和。
\n\n
示例 1：
\n\n\n输入：s = \"aabcb\"\n输出：5\n解释：美丽值不为零的字符串包括 [\"aab\",\"aabc\",\"aabcb\",\"abcb\",\"bcb\"] ，每一个字符串的美丽值都为 1 。\n\n
示例 2：
\n\n\n输入：s = \"aabcbaa\"\n输出：17\n\n\n
\n\n
提示：
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"style": "LEETCODE",
"exampleTestcases": "\"aabcb\"\n\"aabcbaa\"",
"__typename": "QuestionNode"
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