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nodchip
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Mar 18, 2026
| rows = len(obstacleGrid) | ||
| columns = len(obstacleGrid[0]) | ||
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| pathCountMatrix = [[0] * columns for _ in range(rows)] |
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こちらのコメントをご参照ください。
tNita/arai60#3 (comment)
| rows = len(obstacleGrid) | ||
| columns = len(obstacleGrid[0]) | ||
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| pathCountMatrix = [[0] * columns for _ in range(rows)] |
There was a problem hiding this comment.
2 次元配列であることは定義から明らかなため、変数名に Matrix と入れなくても良いと思います。
| if not obstacleGrid or not obstacleGrid[0]: | ||
| return 0 | ||
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| rows = len(obstacleGrid) |
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自分は num_rows num_columns と名付けるのですが、趣味の範囲だと思います。
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ありがとうございます。
そちらのほうが使いやすいと思いました。
| rows = len(obstacleGrid) | ||
| columns = len(obstacleGrid[0]) | ||
|
|
||
| pathCountMatrix = [[0] * columns for _ in range(rows)] |
There was a problem hiding this comment.
経路長を 1 行分のみ保持する書き方もあります。興味があれば探してみてください。
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今回の問題
Unique Paths II - LeetCode
使用言語
Python