feat: add solutions to lc problem: No.3614

[yanglbme]

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[Copilot]

Pull request overview

This PR adds multi-language solutions and explanation for LeetCode 3614 (“Process String with Special Operations II”), and also performs broader documentation/index maintenance across several existing problems.

Changes:

• Added solution implementations for LC 3614 in Python/Java/C++/Go/TypeScript, plus expanded CN/EN solution write-ups.
• Updated solution/README.md and solution/README_EN.md entries for problems 3940–3948 (row numbering + tags).
• Added front-matter tags to multiple problem READMEs; minor README formatting/cleanup (including removal of hidden injected HTML in 3951 EN statement).

Reviewed changes

Copilot reviewed 29 out of 30 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
solution/README.md	Updates table rows for 3940–3948 with indices and tags.
solution/README_EN.md	Updates table rows for 3940–3948 with indices and tags (EN).
solution/3900-3999/3955.Valid Binary Strings With Cost Limit/README.md	Minor markdown formatting cleanup around a math block.
solution/3900-3999/3951.Minimum Energy to Maintain Brightness/README_EN.md	Removes hidden injected HTML and fixes punctuation in an example line.
solution/3900-3999/3948.Lexicographically Maximum MEX Array/README.md	Adds front-matter tags.
solution/3900-3999/3948.Lexicographically Maximum MEX Array/README_EN.md	Adds front-matter tags (EN).
solution/3900-3999/3947.Maximum Number of Items From Sale II/README.md	Adds front-matter tags.
solution/3900-3999/3947.Maximum Number of Items From Sale II/README_EN.md	Adds front-matter tags (EN).
solution/3900-3999/3946.Maximum Number of Items From Sale I/README.md	Adds front-matter tags.
solution/3900-3999/3946.Maximum Number of Items From Sale I/README_EN.md	Adds front-matter tags (EN).
solution/3900-3999/3945.Digit Frequency Score/README.md	Adds front-matter tags.
solution/3900-3999/3945.Digit Frequency Score/README_EN.md	Adds front-matter tags (EN).
solution/3900-3999/3944.Minimum Operations to Make Array Modulo Alternating II/README.md	Adds front-matter tags.
solution/3900-3999/3944.Minimum Operations to Make Array Modulo Alternating II/README_EN.md	Adds front-matter tags (EN).
solution/3900-3999/3943.Number of Pairs After Increment/README.md	Adds front-matter tags.
solution/3900-3999/3943.Number of Pairs After Increment/README_EN.md	Adds front-matter tags (EN).
solution/3900-3999/3942.Minimum Operations to Sort a Permutation/README.md	Adds front-matter tags.
solution/3900-3999/3942.Minimum Operations to Sort a Permutation/README_EN.md	Adds front-matter tags (EN).
solution/3900-3999/3941.Password Strength/README.md	Adds front-matter tags.
solution/3900-3999/3941.Password Strength/README_EN.md	Adds front-matter tags (EN).
solution/3900-3999/3940.Limit Occurrences in Sorted Array/README.md	Adds front-matter tags.
solution/3900-3999/3940.Limit Occurrences in Sorted Array/README_EN.md	Adds front-matter tags (EN).
solution/3600-3699/3614.Process String with Special Operations II/Solution.ts	Adds TypeScript solution for LC 3614.
solution/3600-3699/3614.Process String with Special Operations II/Solution.py	Adds Python solution for LC 3614.
solution/3600-3699/3614.Process String with Special Operations II/Solution.java	Adds Java solution for LC 3614.
solution/3600-3699/3614.Process String with Special Operations II/Solution.go	Adds Go solution for LC 3614.
solution/3600-3699/3614.Process String with Special Operations II/Solution.cpp	Adds C++ solution for LC 3614.
solution/3600-3699/3614.Process String with Special Operations II/README.md	Expands CN explanation and includes multi-language code listings.
solution/3600-3699/3614.Process String with Special Operations II/README_EN.md	Expands EN explanation and includes multi-language code listings.

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