#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int,int> P;
int INF = 1e18;
int mod = 1e9+7;
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
signed main() {
    int N;
    cin >> N;
    vector<int>A(N+1);
    for(int i = 1; i <= N; i++) {
        cin >> A[i];
    }
    int sum = 0;
    for(int i = N; i >= 1; i--) {
        if(A[i]+sum == 0) {
            continue;
        }
        else if((A[i]+sum)%i == 0) {
            sum += (A[i]+sum)/i;
        }
        else {
            cout << "No" << endl;
            return 0;
        }
    }
    cout << "Yes" << endl;
}