n=int(input())
l=[]
from collections import Counter
for i in range(n):
    s=input()
    l.append(s)

c=Counter(l)
l2=list(set(l))
p=0
for x in l2:
    p=max(p,c[x])
a=n//2
if n%2==0:
    if a>=p:
        print("YES")
    else:
        print("NO")
elif n%2==1:
    if a+1>=p or a>=p:
        print("YES")
    else:
        print("NO")