#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<bitset>
#include<set>
#include<map>
#include<stack>
#include<queue>
#include<deque>
#include<list>
#include<iomanip>
#include<cmath>
#include<cstring>
#include<functional>
#include<cstdio>
#include<cstdlib>
#include<numeric>
using namespace std;

#define repr(i, a, b) for (int i = (int)(a); i < (int)(b); i++)
#define rep(i, n) repr(i, 0, n)
#define INF 2e9
//#define MOD 1000000007
#define MOD 998244353
#define LINF (long long)4e18
#define jck 3.141592

const double EPS = 1e-10;

using ll = long long;
using Pi = pair<int,int>;
using Pl = pair<ll,ll>;



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