N, M, T = map(int, input().split())
A = list(map(int, input().split()))

def func(time):
    B = [0]*N
    cnt = 0
    for a in A:
        a -= 1
        if B[a] < time:
            B[a] += 1
        else:
            cnt += 1
    if cnt == 0:
        return True
    for i in range(N):
        diff = time-B[i]
        cnt -= diff//T
        if cnt <= 0:
            return True
    return False

left = 0
right = T*M
while left+1 < right:
    mid = (left+right)//2
    if not func(mid):
        left = mid
    else:
        right = mid

print(right)