#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
using ll = long long ;
using P = pair<int,int> ;
using pll = pair<long long,long long>;
constexpr int INF = 1e9;
constexpr long long LINF = 1e17;
constexpr int MOD = 1000000007;
constexpr double PI = 3.14159265358979323846;

int main(){
    int n;
    cin >> n;
    vector<ll> a(n+1);
    rep(i,n) cin >> a[i+1];
    ll cnt = 0;
    bool ok = true;
    for(ll i=n;i>=1;i--){
        if(a[i]>i) ok = false;
        if((a[i]+cnt)%i!=0) ok = false;
        else{
            cnt += (a[i]+cnt)/i;
        }
    }
    if(ok) cout << "Yes" << endl;
    else cout << "No" << endl;
    return 0;
}