The variance of a string is defined as the largest difference between the number of occurrences of any 2 characters present in the string. Note the two characters may or may not be the same.
Given a string s consisting of lowercase English letters only, return the largest variance possible among all substrings of s.
A substring is a contiguous sequence of characters within a string.
\n\n\n
Example 1:
\n\n\nInput: s = "aababbb"\nOutput: 3\nExplanation:\nAll possible variances along with their respective substrings are listed below:\n- Variance 0 for substrings "a", "aa", "ab", "abab", "aababb", "ba", "b", "bb", and "bbb".\n- Variance 1 for substrings "aab", "aba", "abb", "aabab", "ababb", "aababbb", and "bab".\n- Variance 2 for substrings "aaba", "ababbb", "abbb", and "babb".\n- Variance 3 for substring "babbb".\nSince the largest possible variance is 3, we return it.\n\n\n
Example 2:
\n\n\nInput: s = "abcde"\nOutput: 0\nExplanation:\nNo letter occurs more than once in s, so the variance of every substring is 0.\n\n\n
\n
Constraints:
\n\n1 <= s.length <= 104s consists of lowercase English letters.Compiled with clang 11 using the latest C++ 20 standard.
Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
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\\r\\n\\r\\nNote that Python 2.7 will not be maintained past 2020. For the latest Python, please choose Python3 instead.
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\\r\\n\\r\\n1. Adding an item to a hash.\\r\\n
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Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms
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Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.
\\r\\n\\r\\nFor Map/TreeMap data structure, you may use sortedcontainers library.
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