package no349;

import java.util.Scanner;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		long max =
				Stream.generate(sc::next).limit(n)
				.collect(Collectors.groupingBy(x -> x, Collectors.counting())).values().stream().mapToLong(x -> x).max().getAsLong();
		System.out.println(max <= (n+1)/2 ? "YES" : "NO");
	}

}