import collections

n = int(input())
a_list = [input() for i in range(n)]

a_clc = collections.Counter(a_list)
max_num = a_clc.most_common()[0][1]

res = 0
if n % 2 == 0:
    if max_num <= int(n / 2):
        res = 1
else:
    if max_num <= int((n + 1) / 2):
        res = 1
        
if res == 1:
    print('YES')
else:
    print('NO')