#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <numeric>
#include <functional>
#include <cmath>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <sstream>
#include <string>
#define repd(i,a,b) for (int i=(int)(a);i<(int)(b);i++)
#define rep(i,n) repd(i,0,n)
#define all(x) (x).begin(),(x).end()
#define mod 1000000007
#define inf 2000000007
#define mp make_pair
#define pb push_back
typedef long long ll;
using namespace std;
template <typename T>
inline void output(T a, int p) {
    if(p) cout << fixed << setprecision(p)  << a << "\n";
    else cout << a << "\n";
}
// end of template

int main() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    // source code
	int N;
	cin >> N;
	vector<string> A(N);
	rep(i, N) cin >> A[i];
	map<string, int> M;
	rep(i, N){
		M[A[i]]++;
	}
	auto it = M.begin();
	while (it != M.end()) {
		if ((*it).second > (N + 1) / 2) {
			output("NO", 0);
			return 0;
		}
		it++;
	}
	output("YES", 0);

	
    return 0;
}