#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int,int>;
#define rep(i,n) for(int i=0;i<n;i++)

const ll mod = ll(1e9) + 7;
const int INF = 1<<29;

int main(){
    int n;
    cin >> n;
    map<string,int> eto;
    rep(i,n){
        string s;
        cin >> s;
        eto[s]++;
    }
    bool ans = 1;
    for (auto x:eto){
        if (n%2==0){
            if (x.second<=n/2) ans = 1;
            else ans = 0;
            if (!ans) break;
        } else {
            if (x.second<=(n+1)/2) ans = 1;
            else ans = 0;
            if (!ans) break;
        }
    }
    if (ans) cout << "YES" << endl;
    else cout << "NO" << endl;
    return 0;
}