#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <stdio.h>
#include <cstring>
#include <queue>
#include <stack>
#include <functional>
#include <math.h>
#include <iomanip>
using namespace std;
#define Would
#define you
const int INF = 999999999;
const int MOD = 1e9 + 7;
const double pi = 3.141592653589793238;

int main() {
	int n;
	cin >> n;
	map<string, int>m;
	for (int i = 0; i < n; ++i) {
		string h;
		cin >> h;
		++m[h];
	}
	for (auto i : m) {
		if (n % 2 == 0) {
			if (n - i.second < i.second) {
				cout << "NO" << endl;
				return 0;
			}
		}
		else {
			if (n - i.second + 1 < i.second) {
				cout << "NO" << endl;
				return 0;
			}
		}
	}
	cout << "YES" << endl;
}