#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import collections


def main():
    n = int(input())
    ornaments = collections.Counter(input() for _ in range(n))
    numbers = sorted(ornaments.values(), reverse=True)
    if numbers[0] <= sum(numbers[1:]):
        print("YES")
    else:
        print("NO")


if __name__ == '__main__':
    main()