gistfile1.txt

from collections import deque

def min_weeks_to_serve(n, k, m, customers, requests):
    requests_queue = deque(requests)
    last_served = {customer: -float('inf') for customer in customers}  # Initialize to a very early week
    current_week = 0

    while requests_queue:
        current_week += 1
        customer = requests_queue.popleft()

        if last_served[customer] + m <= current_week:
            last_served[customer] = current_week
        else:
            requests_queue.append(customer)
            current_week -= 1  # We couldn't serve this week

    return current_week

# Read input (Assuming you have a way to get this input)
n, k, m = map(int, input().split())
customers = input().split()
requests = input().split()

# Calculate and print the result
result = min_weeks_to_serve(n, k, m, customers, requests)
print(result)