import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String[] sa = br.readLine().split(" ");
		int[] a = new int[n + 1];
		for (int i = 0; i < n; i++) {
			a[i + 1] = Integer.parseInt(sa[i]);
		}
		br.close();

		int cnt = 0;
		for (int i = n; i > 0; i--) {
			int s = a[i] + cnt;
			if (s % i != 0) {
				System.out.println("No");
				return;
			}
			cnt += s / i;
		}
		System.out.println("Yes");
	}
}