#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
int main(){
    ll N;cin>>N;
    vector<int>A(N);
    ll ans = 0;
    rep(i,N){
        cin>>A[i];
        ans += (A[0]-A[i])%1000000000;
    }
    if(ans%N==0)cout<<"Yes"<<endl;
    else cout<<"No"<<endl;
    //cout<<ans<<endl;
}