import java.util.HashMap; import java.util.Map; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int N = sc.nextInt(); Map zodiac = new HashMap(); for (int i = 0; i < N; i ++) { String animal = sc.next(); if (zodiac.containsKey(animal)) { zodiac.put(animal , zodiac.get(animal) + 1); } else { zodiac.put(animal, 1); } } int animalMax = 0; for (int numAnimal : zodiac.values()) { animalMax = Math.max(animalMax, numAnimal); } if (animalMax < N - animalMax) { System.out.println("YES"); } else { System.out.println("NO"); } } }