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2026. Low-Quality Problems
Description
Table: Problems
+-------------+------+ | Column Name | Type | +-------------+------+ | problem_id | int | | likes | int | | dislikes | int | +-------------+------+ In SQL, problem_id is the primary key column for this table. Each row of this table indicates the number of likes and dislikes for a LeetCode problem.
Find the IDs of the low-quality problems. A LeetCode problem is low-quality if the like percentage of the problem (number of likes divided by the total number of votes) is strictly less than 60%.
Return the result table ordered by problem_id in ascending order.
The result format is in the following example.
Example 1:
Input: Problems table: +------------+-------+----------+ | problem_id | likes | dislikes | +------------+-------+----------+ | 6 | 1290 | 425 | | 11 | 2677 | 8659 | | 1 | 4446 | 2760 | | 7 | 8569 | 6086 | | 13 | 2050 | 4164 | | 10 | 9002 | 7446 | +------------+-------+----------+ Output: +------------+ | problem_id | +------------+ | 7 | | 10 | | 11 | | 13 | +------------+ Explanation: The like percentages are as follows: - Problem 1: (4446 / (4446 + 2760)) * 100 = 61.69858% - Problem 6: (1290 / (1290 + 425)) * 100 = 75.21866% - Problem 7: (8569 / (8569 + 6086)) * 100 = 58.47151% - Problem 10: (9002 / (9002 + 7446)) * 100 = 54.73006% - Problem 11: (2677 / (2677 + 8659)) * 100 = 23.61503% - Problem 13: (2050 / (2050 + 4164)) * 100 = 32.99002% Problems 7, 10, 11, and 13 are low-quality problems because their like percentages are less than 60%.
Solutions
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# Write your MySQL query statement below SELECT problem_id FROM Problems WHERE likes / (likes + dislikes) < 0.6 ORDER BY problem_id;