#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;
using ll = long long;
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
int main() {
  int N; cin >> N;
  vector<string> A(N);
  for(int i = 0; i< N;i++) cin >> A[i];
  map<string,int> dic;
  for(int i = 0; i < N; i++) {
    dic[A[i]]++;
  }
  int x = N / 2;
  if(N % 2 == 1) {
   x += 1;
  }
  bool fire = false;
  for (const auto& [key, value] : dic) {
   if(x < value) {
     fire = true;
   }
  }
  if(fire == false) {
    cout << "YES" <<endl;
  }else {
    cout << "NO" << endl;
  }
}