#include <bits/stdc++.h>

using namespace std;

int main() {
    int N;cin>>N;
    map<string,int> eto;
    for(int i = 0; i < N; i++){
        string A;cin>>A;
        eto[A]++;
    }
    vector<int> num;
    for(auto& it : eto)num.push_back(it.second);
    sort(num.begin(),num.end());
    int sum=0;
    for(auto& it : num)sum+=it;
    if(sum-num.back()>=num.back()-1)cout<<"YES"<<endl;
    else cout<<"NO"<<endl;
    return 0;
}