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skypenguins
reviewed
Aug 1, 2025
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| class Solution3: | ||
| def isSubsequence(self, s: str, t: str) -> bool: | ||
| chat_to_indices = defaultdict(list) |
hroc135
reviewed
Aug 3, 2025
| * t の char を consume していって、s の最後まで到達できれば ok というのはすぐに考えた | ||
| * Counter みたいな解法 (anagram 的な) も一瞬考えてみたけど subsequence で、出現回数だけでなく順番も大事だから解けないと思った。 | ||
| * 4:00 くらいで `SolutionWA` 書いた。 | ||
| * 脳内で走らせてみて動くと思ったので submit したが WA。s が空文字列のときを考えていなかった。 |
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事前に自分でテストケースを挙げて最後に脳内シミュレーションをするのもいい練習になると思います。
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392. Is Subsequence
https://leetcode.com/problems/is-subsequence/