LeetCode 17. Letter Combinations of a Phone Number#60
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liquo-rice
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Mar 20, 2026
| std::stack<std::pair<int, std::vector<char>>> combinations_in_progress; | ||
| combinations_in_progress.push({0, {}}); | ||
| while (!combinations_in_progress.empty()) { | ||
| auto [digit_index, combination_in_progress] = combinations_in_progress.top(); |
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不要なオブジェクトのコピーが走っているところがいくつかありそうです。こことか。std::moveした方が良さそうです。
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ありがとうございます。自分の中で欠けていた視点だったので、参考になりました。
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https://leetcode.com/problems/letter-combinations-of-a-phone-number/description/