Department Collaboration

In a company with multiple departments, employees from different departments can collaborate on projects. The collaboration can form groups, and you are to find the number of distinct collaboration groups formed based on the pairs of employees that can work together. Input Format: The first line contains an integer n, the number of employees (1 ≤ n ≤ 1000). The next line contains an integer m, the number of collaboration pairs (0 ≤ m ≤ 2000). The following m lines each contain two integers a and b, indicating that employee a can collaborate with employee b. Output Format: Print the number of distinct collaboration groups. Example: Input: 4 3 1 2 2 3 4 1 Output: 2