#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
const long long inf = 1e18;
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long t = 1;
  while (t--) {
    long long n;
    cin >> n;
    unordered_map<long long, long long> cnt;
    for (auto i = 0; i < n; i++) {
      long long temp;
      cin >> temp;
      cnt[temp] += 1;
    }
    long long len = (n & 1) ? ((n / 2) + 1) : (n / 2);
    unordered_map<long long, long long>::iterator itr = cnt.begin();
    for (; itr != cnt.end(); itr++) {
      if (itr->second > (len)) {
        cout << "NO";
        exit(0);
      }
    }
    cout << "YES";
  }
  return 0;
}
