How to Solve Replace All Digits with Characters Problem
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Replace All Digits with Characters
You are given a 0-indexed string s that has lowercase English letters in its even indices and digits in its odd indices. You must perform an operation shift(c, x), where c is a character and x is a di...
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Understanding the Replace All Digits with Characters Problem
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Problem Statement
You are given a 0-indexed string s that has lowercase English letters in its even indices and digits in its odd indices. You must perform an operation shift(c, x), where c is a character and x is a digit, that returns the xth character after c. For example, shift('a', 5) = 'f' and shift('x', 0) = 'x'. For every odd index i, you want to replace the digit s[i] with the result of the shift(s[i-1], s[i]) operation. Return s after replacing all digits. It is guaranteed that shift(s[i-1], s[i]) will never exceed 'z'. Note that shift(c, x) is not a preloaded function, but an operation to be implemented as part of the solution.
Replace All Digits with Characters
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Examples
s = "a1c1e1""abcdef"The digits are replaced as follows: - s[1] -> shift('a',1) = 'b' - s[3] -> shift('c',1) = 'd' - s[5] -> shift('e',1) = 'f'
s = "a1b2c3d4e""abbdcfdhe"The digits are replaced as follows: - s[1] -> shift('a',1) = 'b' - s[3] -> shift('b',2) = 'd' - s[5] -> shift('c',3) = 'f' - s[7] -> shift('d',4) = 'h'
Constraints
1 <= s.length <= 100s consists only of lowercase English letters and digits.shift(s[i-1], s[i]) <= 'z' for all odd indices i.How Interview Coder Helps with Leetcode Problems
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