The Crowded Buffet

In a luxury hotel, N guests arrive and leave the buffet at specific times. Each guest 'i' is present during the interval [start_i, end_i). This means they are present at start_i but have left exactly by end_i. The hotel manager wants to know the maximum number of guests present at the same time to ensure enough seating. Input Format: The first line contains N. The next N lines each contain two integers, start and end. Output Format: Print a single integer representing the maximum overlap. Example: Input: 3 10 20 15 25 20 30 Output: 2