#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("YES");}else{puts("NO");}
#define MAX_N 200005

int main() {
    ll n;
    cin >> n;
    ll a[n+1] = {};
    srep(i,1,n+1)cin >> a[i];
    ll keep = 0;
    drep(i,n+1){
        if(i==0) break;
        a[i] += keep;
        if(a[i] % i != 0){
            cout << "No" << endl;
            return 0;
        }else{
            keep += a[i] / i;
        }
    }
    cout << "Yes" << endl;
    return 0;
}