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.

Input

The first line contains integer n (1 ≤ n ≤ 100) — the number of elements in the array. The second line contains n integers a1, a2, ..., an (1 ≤ ai ≤ 1000) — the array elements.

Output

In the single line print "YES" (without the quotes) if Yaroslav can obtain the array he needs, and "NO" (without the quotes) otherwise.

Examples

Input

1
1


Output

YES


Input

3
1 1 2


Output

YES


Input

4
7 7 7 7


Output

NO

Note

In the first sample the initial array fits well.

In the second sample Yaroslav can get array: 1, 2, 1. He can swap the last and the second last elements to obtain it.

In the third sample Yarosav can't get the array he needs.


import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        if (n == 1) {
            System.out.println("YES");
            return;
        }
        int a[] = new int[1002];
        for (int i = 0; i < n; i++) {
            a[sc.nextInt()]++;
        }
        for (int i = 0; i < a.length; i++) {
            if (n%2== 0){
                if (a[i]>n/2){
                    System.out.println("NO");
                    return;
                }
            } else{
                if (a[i]>((n/2)+1)){
                    System.out.println("NO");
                    return;
                }
            }
        }
        System.out.println("YES");
    }
}