LeetCode 1353: Maximum Number of Events That Can Be Attended Solution

Master LeetCode problem 1353 (Maximum Number of Events That Can Be Attended), a medium 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.

1353. Maximum Number of Events That Can Be Attended

Medium

Array Greedy Sorting Heap (Priority Queue)

Problem Explanation

Explanation

To solve this problem, we can follow these steps:

Sort the events based on their end day in ascending order.
Initialize a set to keep track of the events that can be attended.
Iterate through the sorted events:
- For each event, iterate from the start day to end day. If a day is found that is not in the set, attend the event on that day and add it to the set.
Return the size of the set, which represents the maximum number of events that can be attended.

Time complexity: O(n log n) where n is the number of events, due to sorting. Space complexity: O(n) to store the set of days.

Solution Code

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

class Solution {
    public int maxEvents(int[][] events) {
        Arrays.sort(events, (a, b) -> a[1] - b[1]);
        Set<Integer> attended = new HashSet<>();
        for (int[] event : events) {
            for (int i = event[0]; i <= event[1]; i++) {
                if (!attended.contains(i)) {
                    attended.add(i);
                    break;
                }
            }
        }
        return attended.size();
    }
}

Try It Yourself

Loading code editor...

Frequently Asked Questions

How to solve LeetCode 1353 (Maximum Number of Events That Can Be Attended)?

This page provides optimized solutions for LeetCode problem 1353 (Maximum Number of Events That Can Be Attended) in Java, C++, and Python, along with a detailed explanation and an interactive code editor to test your code.

What is the time complexity of LeetCode 1353 (Maximum Number of Events That Can Be Attended)?

The time complexity for LeetCode 1353 (Maximum Number of Events That Can Be Attended) varies by solution. Check the detailed explanation section for specific complexities in Java, C++, and Python implementations.

Can I run code for LeetCode 1353 on DevExCode?

Yes, DevExCode provides an interactive code editor where you can write, test, and run your code for LeetCode 1353 in Java, C++, or Python.

Back to LeetCode Solutions