#include <bits/stdc++.h>

using namespace std;

int main(void) {
  int n;
  cin >> n;

  map<string, int> mp;
  for (int i = 0; i < n; i++) {
    string s;
    cin >> s;
    mp[s]++;
  }

  int M = 0, sum = 0;
  for (auto i : mp) {
    M = max(M, i.second);
    sum += i.second;
  }
  cout << (M - (sum - M) > 1 ? "NO" : "YES") << endl;

  return 0;
}