651 B | 651 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
BLANK = " "
#inp = input
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
n = ii()
l = mii()
d = {}
for i in l:
d[i] = d.get(i, 0) + 1
d = sorted(d.items(), key = lambda t:(-t[1]))
if d[0][1] <= (n + 1) // 2:
p("YES")
else:
p("NO")
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()