JuniorString
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 digit, that returns the x^th character after c.
- For example,
shift('a', 5) = 'f'andshift('x', 0) = 'x'.
For every odd index i, 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.
Example 1
Input
s = "a1c1e1"Output
"abcdef"The digits are replaced by shifting the preceding letters:
a by 1 to b, c by 1 to d, and e by 1 to f.Example 2
Input
s = "a1b2c3d4e"Output
"abbdcfdhe"The digits are replaced by shifting the preceding letters:
a by 1 to b, b by 2 to d, c by 3 to f, and d by 4 to h.Constraints
- 1 <= s.length <= 100
- s consists only of lowercase English letters and digits.
- shift(s[i-1], s[i]) <= 'z' for all odd indices i.