#include <iostream>
#include <iomanip>
#include <algorithm>
#include <string>
#include <map>
#include <cmath>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
    int n;
    cin >> n;
    int arr[n];
    int freq[1000]={};
    for (int i=0; i<n; i++) {
        cin >> arr[i];
        freq[arr[i]]++;
    }
    int mx=0;
    int mxIdx=0;
    long long sum=0;
    for (int i=0; i<1000; i++) {
        if (freq[i]>mx) mxIdx=i;
        mx = max (mx, freq[i]);
        sum += freq[i];
    }
    sum -= freq[mxIdx];
    if (sum < mx-1) cout << "NO";
    else cout << "YES";
    return 0;
}