# import sys; input = sys.stdin.buffer.readline # sys.setrecursionlimit(10**7) from collections import defaultdict con = 10 ** 9 + 7; INF = float("inf") def getlist(): return list(map(int, input().split())) #処理内容 def main(): N = int(input()) D = defaultdict(int) for i in range(N): A = input() D[A] += 1 L = [] for i in D: L.append(D[i]) for i in L: if i >= (N + i) // 2: print("NO") return print("YES") if __name__ == '__main__': main()