You are given two strings a and b that consist of lowercase letters. In one operation, you can change any character in a or b to any lowercase letter.
Your goal is to satisfy one of the following three conditions:
\n\na is strictly less than every letter in b in the alphabet.b is strictly less than every letter in a in the alphabet.a and b consist of only one distinct letter.Return the minimum number of operations needed to achieve your goal.
\n\n\n
Example 1:
\n\n\nInput: a = "aba", b = "caa"\nOutput: 2\nExplanation: Consider the best way to make each condition true:\n1) Change b to "ccc" in 2 operations, then every letter in a is less than every letter in b.\n2) Change a to "bbb" and b to "aaa" in 3 operations, then every letter in b is less than every letter in a.\n3) Change a to "aaa" and b to "aaa" in 2 operations, then a and b consist of one distinct letter.\nThe best way was done in 2 operations (either condition 1 or condition 3).\n\n\n
Example 2:
\n\n\nInput: a = "dabadd", b = "cda"\nOutput: 3\nExplanation: The best way is to make condition 1 true by changing b to "eee".\n\n\n
\n
Constraints:
\n\n1 <= a.length, b.length <= 105a and b consist only of lowercase letters.Compiled with clang 11 using the latest C++ 17 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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