#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>
#include <bitset>
#include <cassert>

using namespace std;
using ll = long long;


int main() {

    int N;
    cin >> N;
    map<string, int> m;
    for (int i = 0; i < N; ++i) {
        string a;
        cin >> a;
        m[a] += 1;
    }

    int l = 0;
    for (auto k:m) {
        l = max(l, k.second);
    }

    if ((N + 2 - 1) / 2 + 1 <= l) {
        cout << "NO" << endl;
    } else {
        cout << "YES" << endl;
    }

    return 0;
}