#define _USE_MATH_DEFINES
#include<iostream>
#include<algorithm>
#include<string>
#include<iomanip>
#include"math.h"
#include<vector>
#include<queue>
#include<map>
#include<set>
#define ll long long
#define dou(s) atof(s.c_str())
#define lll(s) atoll(s.c_str())
#define str(n) to_string(n)
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define rrep(i,b,a) for(ll i=b;i>=a;i--)
#define ALL(a) a.begin(),a.end()
#define fion(n) fixed<<setprecision(n)
#define endl "\n"
#define OR ||
#define AND &&
#define NOT !
#define line(s) getline(cin,s)
#define pushb(n) push_back(n)
#define popb(a) a[a.size()-1];a.pop_back()
#define popf(a) a.front();a.pop()
#define START int main(){cin.tie(0);ios::sync_with_stdio(false);
#define END }
using namespace std;
START
ll a;cin>>a;
map<string,ll> s;
string n;
ll k=a/2+a%2;
rep(i,0,a){
  cin>>n;
  s[n]++;
  if(s[n]>k){
    cout<<"NO"<<endl;
    return 0;
  }
}
cout<<"YES"<<endl;
END