mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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@@ -12,12 +12,12 @@
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"translatedContent": "<p>表: <code>Teacher</code></p>\n\n<pre>\n+-------------+------+\n| Column Name | Type |\n+-------------+------+\n| teacher_id | int |\n| subject_id | int |\n| dept_id | int |\n+-------------+------+\n在 SQL 中,(subject_id, dept_id) 是该表的主键。\n该表中的每一行都表示带有 teacher_id 的教师在系 dept_id 中教授科目 subject_id。\n</pre>\n\n<p> </p>\n\n<p>查询每位老师在大学里教授的科目种类的数量。</p>\n\n<p data-group=\"1-1\">以 <strong>任意顺序</strong> 返回结果表。</p>\n\n<p>查询结果格式示例如下。</p>\n\n<p> </p>\n\n<p><strong>示例 1:</strong></p>\n\n<pre>\n<strong>输入:</strong> \nTeacher 表:\n+------------+------------+---------+\n| teacher_id | subject_id | dept_id |\n+------------+------------+---------+\n| 1 | 2 | 3 |\n| 1 | 2 | 4 |\n| 1 | 3 | 3 |\n| 2 | 1 | 1 |\n| 2 | 2 | 1 |\n| 2 | 3 | 1 |\n| 2 | 4 | 1 |\n+------------+------------+---------+\n<strong>输出:</strong> \n+------------+-----+\n| teacher_id | cnt |\n+------------+-----+\n| 1 | 2 |\n| 2 | 4 |\n+------------+-----+\n<strong>解释:</strong> \n教师 1:\n - 他在 3、4 系教科目 2。\n - 他在 3 系教科目 3。\n教师 2:\n - 他在 1 系教科目 1。\n - 他在 1 系教科目 2。\n - 他在 1 系教科目 3。\n - 他在 1 系教科目 4。</pre>\n",
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"difficulty": "Easy",
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@@ -40,6 +40,12 @@
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@@ -51,15 +57,9 @@
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"code": "import pandas as pd\n\ndef count_unique_subjects(teacher: pd.DataFrame) -> pd.DataFrame:\n ",
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