How to Solve Find Followers Count Problem
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Find Followers Count
Table: Followers +-------------+------+ | Column Name | Type | +-------------+------+ | user_id | int | | follower_id | int | +-------------+------+ (user_id, follower_id) is the primary key (co...
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Understanding the Find Followers Count Problem
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Problem Statement
Table: Followers +-------------+------+ | Column Name | Type | +-------------+------+ | user_id | int | | follower_id | int | +-------------+------+ (user_id, follower_id) is the primary key (combination of columns with unique values) for this table. This table contains the IDs of a user and a follower in a social media app where the follower follows the user. Write a solution that will, for each user, return the number of followers. Return the result table ordered by user_id in ascending order. The result format is in the following example.
Find Followers Count
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Examples
Example inputExample outputThe followers of 0 are {1} The followers of 1 are {0} The followers of 2 are {0,1}
Constraints
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