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This approach involves using SQL to filter out invalid tweets directly from the database. The key is to use the WHERE clause to check the length of the tweet content and return those with a length strictly greater than 15.
Time Complexity: O(n), where n is the number of tweets in the table. This is due to the need to calculate the length for each tweet.
Space Complexity: O(1), as we are using in-place operations without any additional data structures.
1SELECT tweet_id FROM Tweets WHERE LENGTH(content) > 15;The SQL solution utilizes the LENGTH function to determine the length of each tweet's content. The WHERE clause effectively filters these lengths and retrieves the tweet IDs of any entries with a content length greater than 15.
This approach reads all tweets and checks their content length programmatically. It uses an iterative process to filter out the invalid tweets by measuring the length of each tweet's content and collecting the IDs of those that are longer than 15 characters.
Time Complexity: O(n), where n is the number of tweets, as each tweet is checked once.
Space Complexity: O(1), constant extra space used regardless of input size.
1using System;
using System.Collections.Generic;
public class Tweets {
public static void FindInvalidTweets(List<int> tweetIds, List<string> contents) {
Console.WriteLine("+----------+\n| tweet_id |\n+----------+");
for (int i = 0; i < contents.Count; i++) {
if (contents[i].Length > 15) {
Console.WriteLine("| {0} |", tweetIds[i]);
}
}
Console.WriteLine("+----------+");
}
}The C# solution iterates through lists of tweet IDs and content. It utilizes the Length property of C#'s string type to determine if a tweet is invalid and then properly prints the invalid tweet IDs.