#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <functional>
#include <set>
#include <ctime>
#include <random>
#include <chrono>
using namespace std;

template<class T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;}
template<class T> istream& operator ,  (istream& is, T& val){ return is >> val;}
template<class T> ostream& operator << (ostream& os, const vector<T>& vec){for(int i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"":" "); return os;}
template<class T> ostream& operator ,  (ostream& os, const T& val){ return os << " " << val;}
template<class T> ostream& operator >> (ostream& os, const T& val){ return os << " " << val;}

int main(){
	int n;
	cin >> n;
	vector<string> s(n);
	cin >> s;
	map<string, int> cnt;
	for(string ss : s){
		cnt[ss]++;
	}

	int m = 0;
	for(auto c:cnt){
		m = max(m, c.second);
	}
	cerr << m << endl;

	if(m>n-m+1){
		cout << "NO" << endl;
	}else{
		cout << "YES" << endl;
	}


	return 0;
}