# -*- coding: utf-8 -*-
"""
No.349 干支の置き物
https://yukicoder.me/problems/no/349

"""
import sys
from sys import stdin
from collections import Counter
input = stdin.readline


def solve(items, N):
    for c in Counter(items).most_common():
        if N % 2 == 0:
            if (c[1]-1)*2 >= N:
                return 'NO'
        else:
            if (c[1]-1)*2 > N:
                return 'NO'
    return 'YES'


def main(args):
    N = int(input())
    items = [input().strip() for _ in range(N)]
    ans = solve(items, N)
    print(ans)


if __name__ == '__main__':
    main(sys.argv[1:])