Yaroslav has an array that consists of *n* integers. In one second Yaroslav can swap two neighboring array elements. Now Yaroslav is wondering if he can obtain an array where any two neighboring elements would be distinct in a finite time.

Help Yaroslav.
The first line contains integer *n* (1 ≤ *n* ≤ 100) — the number of elements in the array. The second line contains *n* integers *a*<sub class="lower-index">1</sub>, *a*<sub class="lower-index">2</sub>, ..., *a*<sub class="lower-index">*n*</sub> (1 ≤ *a*<sub class="lower-index">*i*</sub> ≤ 1000) — the array elements.
n = int(input())
a = list(map(int, input().split()))
d = {}
for i in range(n):
    if a[i] in d:
        d[a[i]] += 1
    else:
        d[a[i]] = 1

ans = 'YES'
for k, v in d.items():
    if n % 2 == 0:
        if d[k] > n // 2:
            ans = 'NO'
    else:
        if d[k] > (n + 1) // 2:
            ans = 'NO'

print(ans)            


        

