Friendship Circles

In a community, friends can form circles of friendships. You are given pairs of friendships and need to determine the size of the largest friendship circle. Each person is represented by a unique integer ID. Input format: - The first line contains an integer F (1 ≤ F ≤ 10^5), the number of friendship pairs. - The next F lines each contain two integers A and B, representing that person A is friends with person B. Output format: - Print the size of the largest friendship circle. Example: Input: 4 1 2 2 3 4 5 4 6 Output: 4