#include <bits/stdc++.h>
using namespace std;

int main(void) {
map<string,int> m;
int n;

cin>>n;
string s[n];
for (int i = 0; i < n; ++i) {
	cin>>s[i];
	m[s[i]]++;
}
int mm=0;
for (int i = 0; i < n; ++i) {
	mm=max(mm,m[s[i]]);
}
if(n%2==1){
cout<<(ceil(n/2)+1<mm?"NO":"YES")<<endl;
}else if(n%2==0){
	cout<<(n/2<mm?"NO":"YES")<<endl;
}
}