#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  map<string, int> mp;
  rep(i, n) {
    string s;
    cin >> s;
    mp[s]++;
  }
  vector<int> cnts(0);
  for (auto p : mp) cnts.push_back(p.second);
  sort(cnts.rbegin(), cnts.rend());
  if (cnts[0] - 1 > n - cnts[0]) {
    cout << "NO" << endl;
  }
  else {
    cout << "YES" << endl;
  }
  return 0;
}