2356. Number of Unique Subjects Taught by Each Teacher LeetCode Solution

Last updated: February 27, 2025

In this guide, you will get 2356. Number of Unique Subjects Taught by Each Teacher LeetCode Solution with the best time and space complexity. The solution to Number of Unique Subjects Taught by Each Teacher problem is provided in various programming languages like C++, Java, and Python. This will be helpful for you if you are preparing for placements, hackathons, interviews, or practice purposes. The solutions provided here are very easy to follow and include detailed explanations.

Table of Contents

  1. Problem Statement
  2. Complexity Analysis
  3. Number of Unique Subjects Taught by Each Teacher solution in C++
  4. Number of Unique Subjects Taught by Each Teacher solution in Java
  5. Number of Unique Subjects Taught by Each Teacher solution in Python
  6. Additional Resources
2356. Number of Unique Subjects Taught by Each Teacher LeetCode Solution image

Problem Statement of Number of Unique Subjects Taught by Each Teacher

Table: Teacher

+————-+——+
| Column Name | Type |
+————-+——+
| teacher_id | int |
| subject_id | int |
| dept_id | int |
+————-+——+
(subject_id, dept_id) is the primary key (combinations of columns with unique values) of this table.
Each row in this table indicates that the teacher with teacher_id teaches the subject subject_id in the department dept_id.

Write a solution to calculate the number of unique subjects each teacher teaches in the university.
Return the result table in any order.
The result format is shown in the following example.

Example not found

Constraints not found

Complexity Analysis

  • Time Complexity: Google AdSense
  • Space Complexity: Google Analytics

2356. Number of Unique Subjects Taught by Each Teacher LeetCode Solution in C++

SELECT
  teacher_id,
  COUNT(DISTINCT subject_id) AS cnt
FROM Teacher
GROUP BY 1;
/* code provided by PROGIEZ */

2356. Number of Unique Subjects Taught by Each Teacher LeetCode Solution in Java

N/A
// code provided by PROGIEZ

2356. Number of Unique Subjects Taught by Each Teacher LeetCode Solution in Python

N/A
 # code by PROGIEZ

Additional Resources

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