[vremyavnikuda]

Summary

Type

• New solution
• Update solution
• Docs
• Other

Checklist

For new or updated solutions:

• README.md / README_EN.md follow solution/template.md
• If a Thinking block is added, it sits after the method heading, is non-empty, and matches the code in the repo (naive idea vs constraints, bottleneck, key observation, why this method). Thinking is optional.
• All languages implement the same algorithm; unrelated Solution.* files and code tabs are unchanged
• Code is formatted as described in AGENTS.md

[yanglbme]

The naming and tab order did not match the other languages for this problem. That is fixed in the follow-up commit on this PR.

Issues

• The helper and locals were named asd, aa, bb, cc, dd, and ee. The Python, Java, C++, Go, and TypeScript solutions use dfs, exp, j, i, a, b, c, and s.
• The Rust block was inserted before Go. For method one the order is Python3, Java, C++, Go, TypeScript, so Rust belongs after TypeScript.

Changes

• dfs(exp) finds the first } and its matching {. The prefix, option, and suffix are a, b, and c. Each expansion is inserted into the set s, which is then returned in sorted order.
• Only method one was changed. The Rust block in README.md and README_EN.md now sits after TypeScript and matches Solution.rs.