#include <bits/stdc++.h>
using namespace std;
template <typename Arg1>
void __f(const char* name, Arg1&& arg1) {
  std::cerr << name << " : " << arg1 << '\n';
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args) {
  const char* comma = strchr(names + 1, ',');
  std::cerr.write(names, comma - names) << " : " << arg1 << " | ";
  __f(comma + 1, args...);
}
const int fx[] = {+1, -1, +0, +0};
const int fy[] = {+0, +0, +1, -1};
void solve() {
  long long int n;
  cin >> n;
  long long int a[n];
  map<long long int, long long int> ma;
  for (long long int i = 0; i < n; i++) {
    cin >> a[i];
    ma[a[i]]++;
  }
  long long int m = 0;
  for (auto x : ma) {
    if (x.second >= m) {
      m = x.second;
    }
  }
  n++;
  if (m <= n / 2) {
    cout << "YES";
  } else
    cout << "NO";
}
signed main() {
  std::ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long int t = 1;
  while (t--) solve();
  return 0;
  return 0;
}
