#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll mod=1000000007;
ll inf=1009999999999999990;
int main(){
    ll n;
    cin >> n;
    vector<ll>a(n);
    ll sum=0;
    ll mx=0;
    for (ll i = 0; i < n; i++)
    {
        cin >> a[i];
        sum+=a[i];
    }
    if (sum%n==0)
    {
        if (n%2==0)
        {
            for (ll i = 1; i < n; i++)
            {
                if (a[i]%2!=a[i-1]%2)
                {
                    cout << "No" << endl;
                    return 0;
                }
            }
        }
        cout << "Yes" << endl;
    }else{
        cout << "No" <<endl;
    }
    
}