Please help me write this program in code block C, thank you:

Read in n, then n lastnames, and check to see if the first in the list is ever repeated again.

Sample Run #1

Enter n, followed by n Last names (each last name must be a single word): 7 Reagan Bush Clinton Bush Obama Trump Biden First name in list is not repeated.

Sample Run #2

Enter n, followed by n Last names (each last name must be a single word): 6 Bush Clinton Bush Obama Trump Biden First name in list is repeated.