#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <iostream>
#include <numeric>
#include <optional>
#include <queue>
#include <unordered_map>
#include <unordered_set>
#include <vector>

using namespace std;

int main() {
    int32_t n;
    cin >> n;
    unordered_map<string, int32_t> mp;
    for (auto i = 0; i < n; ++i) {
        string a;
        cin >> a;
        ++mp[a];
    }
    int32_t mx = 0;
    for (auto &&p : mp) {
        mx = max(mx, p.second);
    }
    cout << (mx <= (n + 1) / 2 ? "YES" : "NO") << endl;
    return 0;
}