Practice Replace All Digits with Characters

Read the task, work through the examples, and check your approach against the constraints. Use the original LeetCode task for coding and submissions.

Easy#1844

LeetCode Problem

Replace All Digits with Characters

String

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 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.

Source: Replace All Digits with Characters on LeetCode. Use the original task for its coding environment and submissions.

Examples

# Example 1

Input

s = "a1c1e1"

Output

"abcdef"

# Example 2

Input

s = "a1b2c3d4e"

Output

"abbdcfdhe"

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.

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