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n = int(input())
an = input()
an = an.split()



counts_dict={}

for a in an:
    if a in counts_dict.keys():
        counts_dict[a]+=1 
    else:
        counts_dict[a]=1

counts = sorted(list(counts_dict.values()))

subsets = 0

while len(counts):
    leader = counts.pop()
    others = 0
    while len(counts) and others+counts[0]<leader:
        counts.pop(0)
    subsets+=1
print(subsets)