/* template.cpp {{{ */
#include <bits/stdc++.h>
using namespace std;

namespace solver {

#define GET_MACRO(a, b, c, d, NAME, ...) NAME
#define REP1(n) REP2(i_, n)
#define REP2(i, n) REP3(i, 0, n)
#define REP3(i, a, b) REP4(i, a, b, 1)
#define REP4(i, a, b, s) for (ll i = (a); i < (ll)(b); i += (ll)(s))
#define RREP1(n) RREP2(i_, n)
#define RREP2(i, n) RREP3(i, 0, n)
#define RREP3(i, a, b) RREP4(i, a, b, 1)
#define RREP4(i, a, b, s) for (ll i = (b) - 1; i >= (ll)(a); i -= (ll)(s))
#define rep(...) GET_MACRO(__VA_ARGS__, REP4, REP3, REP2, REP1)(__VA_ARGS__)
#define rrep(...) GET_MACRO(__VA_ARGS__, RREP4, RREP3, RREP2, RREP1)(__VA_ARGS__)
#define each(x, c) for (auto &&x : c)
#define all(c) std::begin(c), std::end(c)

using ll = long long;
using ull = unsigned long long;
using uint = unsigned int;
using ld = long double;
template<typename T>
using MinPQ = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using MaxPQ = priority_queue<T, vector<T>, less<T>>;
template<bool cond, typename T = void>
using enable_if_t = typename enable_if<cond, T>::type;

const int INF = 1e9 + 10;
const ll INF_LL = 1e18 + 10;
const double INF_D = 1e12;
const ld INF_LD = 1e24;
const ld EPS = 1e-8;
const ld PI = acos(-1.0l);
const int dx[] = {-1, 0, 1, 0, -1, 1, 1, -1};
const int dy[] = {0, -1, 0, 1, -1, -1, 1, 1};

template<typename T>
inline T sq(const T &x){ return x * x; }
template<typename T, typename U>
inline T &chmin(T &x, const U &y){ if (x > y) x = y; return x; }
template<typename T, typename U>
inline T &chmax(T &x, const U &y){ if (x < y) x = y; return x; }

ll gcd(ll a, ll b){ return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b){ return a / gcd(a, b) * b; }
tuple<ll, ll, ll> extgcd(ll a, ll b){
  if (b == 0) return make_tuple(a, 1, 0);
  ll g, x, y;
  tie(g, x, y) = extgcd(b, a % b);
  return make_tuple(g, y, x - a / b * y);
}
ll invmod(ll a, ll m = 1000000007){
  ll g, x;
  tie(g, x, ignore) = extgcd(a, m);
  return g == 1 ? (x + m) % m : 0;
}

void solve();

}

signed main(){
  auto begin = std::chrono::high_resolution_clock::now();
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  std::cout << std::fixed << std::setprecision(12);
  solver::solve();
  auto end = std::chrono::high_resolution_clock::now();
  auto time = std::chrono::duration_cast<std::chrono::milliseconds>(end - begin);
#ifdef DEBUG
  std::cerr << "time: " << time.count() << " [ms]" << std::endl;
#endif
}

namespace solver {
/* }}} */

void solve(){
  map<string, int> mp;
  int n;
  cin >> n;
  int mx = 0;
  rep(n){
    string s;
    cin >> s;
    chmax(mx, ++mp[s]);
  }
  cout << (mx <= (n + 1) / 2 ? "YES\n" : "NO\n");
}

} /* namespace solver */