Report Spam Message

You are given an array of strings message and an array of strings bannedWords.

An array of words is considered spam if there are at least two words in it that exactly match any word in bannedWords.

Return true if the array message is spam, and false otherwise.

LeetCode Problem - 3295

class Solution {
    public boolean reportSpam(String[] message, String[] bannedWords) {
        // Create a set from the banned words for faster lookup
        Set<String> bannedWordSet = new HashSet<>(Arrays.asList(bannedWords));

        int flag = 0;  // Initialize a counter to track the number of banned words found
        for (String str : message) {
            // Check if the current word is in the set of banned words
            if (bannedWordSet.contains(str)) {
                flag++;  // Increment the counter if a banned word is found
            }
            // If two or more banned words are found, report as spam
            if (flag == 2) return true;
        }
        // If fewer than two banned words are found, return false
        return false;
    }
}