def s(x):return len(x)
input();a=[int(i)for i in input().split(' ')];c=[]
for i in range(min(a),max(a)+1):
    if i in a:c.append([j for j in a if j==i])
c.sort(key=s);l=c[::-1];j=0
for i in c:
    while 2*i.count(i[0])>(len(i)+len(l[j])):
        i.append(l[j][-1]);l[j]=l[j][:-1]
        if len(l[j])==0:l.remove(l[j])
        j-=1
    j+=1
print(len(l))