You are given a string s consisting of only lowercase English letters. In one operation, you can do the following:
s, possibly the entire string, then replace each one of its characters with the previous character of the English alphabet. For example, 'b' is converted to 'a', and 'a' is converted to 'z'.Return the lexicographically smallest string you can obtain after performing the above operation exactly once.
\n\nA substring is a contiguous sequence of characters in a string.
\nA stringx is lexicographically smaller than a string y of the same length if x[i] comes before y[i] in alphabetic order for the first position i such that x[i] != y[i].\n\n
Example 1:
\n\n\nInput: s = "cbabc"\nOutput: "baabc"\nExplanation: We apply the operation on the substring starting at index 0, and ending at index 1 inclusive. \nIt can be proven that the resulting string is the lexicographically smallest. \n\n\n
Example 2:
\n\n\nInput: s = "acbbc"\nOutput: "abaab"\nExplanation: We apply the operation on the substring starting at index 1, and ending at index 4 inclusive. \nIt can be proven that the resulting string is the lexicographically smallest. \n\n\n
Example 3:
\n\n\nInput: s = "leetcode"\nOutput: "kddsbncd"\nExplanation: We apply the operation on the entire string. \nIt can be proven that the resulting string is the lexicographically smallest. \n\n\n
\n
Constraints:
\n\n1 <= s.length <= 3 * 105s consists of lowercase English lettersCompiled with clang 11 using the latest C++ 20 standard.
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