#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>



using namespace std;




int main() {

	map<string,int>x;
	int n;
	cin>>n;
	int t=0;
	for(int i=0;i<n;i++){
		string p;
		cin>>p;
		x[p]++;
		t=max(t,x[p]);
	}
	if(2*t-1>n)cout<<"NO"<<endl;
	else cout<<"YES"<<endl;

	return 0;
}