#include <bits/stdc++.h>
#define endl '\n'
typedef long long ll;
using namespace std;

int main(void) {
	ios::sync_with_stdio(false);
	cin.tie(0);

	int n;
	cin >> n;

	vector<int> a(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	
	ll tot = accumulate(a.begin(), a.end(), 0LL);
	string ans = "No";
	if (tot % n == 0) {
		ll m = tot / n;
		ll diff = 0;
		for (int i = 0; i < n; i++) {
			diff += a[i] - m;
		}
		if (diff % (n - 1) == 0) ans = "Yes";
	}

	cout << ans << endl;

	return 0;
}