#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define coutf(f) cout << fixed << setprecision(f)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()

int main() {
	int n;
	cin >> n;
	map<string, int> mp;
	int mx = 0;
	rep(i, n) {
		string a;
		cin >> a;
		mp[a]++;
		mx = max(mx, mp[a]);
	}
	if (mx > (n + 1) / 2) {
		cout << "NO" << endl;
	}
	else {
		cout << "YES" << endl;
	}
	return 0;
}