N,M,T = map(int,input().split())
A = list(map(int,input().split()))
from collections import Counter
C = Counter(A)

def is_ok(t):
    task = 0
    free_time = 0
    for n in range(1,N+1):
        if t < C[n]:
            task += C[n] - t
        else:
            free_time += t - C[n]
    return free_time // T >= task


ok = 10**15
ng = 0
while ok - ng > 1:
    mid = (ok + ng) // 2
    if is_ok(mid):
        ok = mid
    else:
        ng = mid
print(ok)