#include <algorithm>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <functional>
#include <iostream>
#include <map>
#include <memory>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <utility>
#include <vector>

using namespace std;

#define sz size()
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define all(c) (c).begin(), (c).end()
#define rep(i,a,b) for(int i=(a);i<(b);++i)
#define clr(a, b) memset((a), (b) ,sizeof(a))

#define MOD 1000000007

int main(){
  int n;
  cin>>n;
  vector<string> vs;
  rep(i,0,n){
    string s;
    cin>>s;
    vs.pb(s);
  }
  int mx = 0;
  rep(i,0,vs.sz){
    int c = 0;
    rep(j,0,vs.sz){
      if(vs[i]==vs[j])c++;
    }
    mx = max(mx,c);
  }
  if(mx<=(vs.sz/2+vs.sz%2)){
    cout << "YES" << endl;
  }
  else{
    cout << "NO" << endl;
  }
  return 0;
}