LeetCode 1939: Users That Actively Request Confirmation Messages Solution

Master LeetCode problem 1939 (Users That Actively Request Confirmation Messages), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

1939. Users That Actively Request Confirmation Messages

Easy

Database

Problem Explanation

Explanation:

To solve this problem, we need to iterate through the given list of users and filter out only those users who have requested confirmation messages. We can achieve this by iterating through the list and checking the value associated with the "confirmation_messages_requested" key for each user.

Iterate through the list of users.
Check if the value associated with the "confirmation_messages_requested" key is true.
If it is true, add the user to the result list.
Return the result list containing users who have actively requested confirmation messages.

Time Complexity: O(n) where n is the number of users in the input list. Space Complexity: O(1) excluding the space required for the result list.

Solution Code

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

class Solution {
    public List<Map<String, Object>> usersActivelyRequestingConfirmationMessages(List<Map<String, Object>> users) {
        List<Map<String, Object>> result = new ArrayList<>();
        
        for (Map<String, Object> user : users) {
            if (user.get("confirmation_messages_requested").equals(true)) {
                result.add(user);
            }
        }
        
        return result;
    }
}

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