import math
import sys
def S(): return sys.stdin.readline().rstrip()
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int, sys.stdin.readline().rstrip().split())
def LI(): return list(map(int, sys.stdin.readline().rstrip().split()))
def LS(): return list(sys.stdin.readline().rstrip().split())

n = I()
d = {}

for i in range(n):
    s = S()
    if s in d:
        d[s] += 1
    else:
        d[s] = 1

if n%2 == 0:
    if max(d.values()) > n//2:
        print("NO")
    else:
        print("YES")
else:
    if max(d.values()) > n//2 + 1:
        print("NO")
    else:
        print("YES")