#include <bits/stdc++.h>
#include <iostream>
#include <ctime>
using namespace std;
#define _LL long long
#define rep(i, n) for (_LL i = 0; i < (_LL)(n); i++)
#define vecrep(itr, v) for (auto itr = (v).begin(); itr != (v).end(); itr++)

bool getans()
{
    int n; cin >> n;
    vector<int> a(n);
    rep(i, n) cin >> a[i];
    int sum = 0;
    for( int k = n; k >= 1; k-- )
    {
        a[k - 1] += sum;
        if( a[k - 1] % k != 0 ) return false;
        sum += a[k - 1] / k;
    }
    return true;
}

int main()
{
    if( getans() )
    {
        cout << "Yes" << endl;
    }
    else
    {
        cout << "No" << endl;
    }
    return 0;    
}