#include<bits/stdc++.h>

using namespace std;
using ll = long long;


int main()
{
    int n; cin >> n;
    vector<int> a(n+1);
    for(int i = 0; i < n; i++)cin >> a[i+1];

    for(int i = 1; i <= n; i++)if(a[i] > i) {
        cout << "No" << endl;
        return 0;
    }
    int sum = 0;

    for(int i = n; i >= 1; i--) {
        if(a[i] % i){cout << "No" << endl; return 0;}
        sum += a[i] / i;
        a[i - 1] += sum;
    }
    cout << "Yes" << endl;


}