{ "data": { "question": { "questionId": "1954", "questionFrontendId": "1844", "boundTopicId": null, "title": "Replace All Digits with Characters", "titleSlug": "replace-all-digits-with-characters", "content": "

You are given a 0-indexed string s that has lowercase English letters in its even indices and digits in its odd indices.

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There is a function shift(c, x), where c is a character and x is a digit, that returns the xth character after c.

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For every odd index i, you want to replace the digit s[i] with shift(s[i-1], s[i]).

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Return s after replacing all digits. It is guaranteed that shift(s[i-1], s[i]) will never exceed 'z'.

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Example 1:

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\nInput: s = "a1c1e1"\nOutput: "abcdef"\nExplanation: The digits are replaced as follows:\n- s[1] -> shift('a',1) = 'b'\n- s[3] -> shift('c',1) = 'd'\n- s[5] -> shift('e',1) = 'f'
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Example 2:

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\nInput: s = "a1b2c3d4e"\nOutput: "abbdcfdhe"\nExplanation: The digits are replaced as follows:\n- s[1] -> shift('a',1) = 'b'\n- s[3] -> shift('b',2) = 'd'\n- s[5] -> shift('c',3) = 'f'\n- s[7] -> shift('d',4) = 'h'
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Constraints:

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Compiled with clang 11 using the latest C++ 20 standard.

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Most standard library headers are already included automatically for your convenience.

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OpenJDK 17. Java 8 features such as lambda expressions and stream API can be used.

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Python 2.7.12.

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C# 10 with .NET 6 runtime

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Node.js 16.13.2.

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Python 3.10.

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Dart 2.17.3

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