#include <bits/stdc++.h> using namespace std; using ll = long long; template <class T> using vec = vector<T>; template <class T> using vvec = vector<vec<T>>; template<class T> bool chmin(T& a,T b){if(a>b) {a = b; return true;} return false;} template<class T> bool chmax(T& a,T b){if(a<b) {a = b; return true;} return false;} #define debug(x) cerr << #x << " = " << (x) << endl; int main(){ cin.tie(0); ios::sync_with_stdio(false); int N; cin >> N; vec<ll> A(N+1); for(int i=1;i<=N;i++){ cin >> A[i]; } ll s = 0; for(int i=N;i>=1;i--){ if(A[i]+s==0) continue; if((A[i]+s)%i!=0){ cout << "No\n"; return 0; } s += (A[i]+s)/i; } cout << "Yes\n"; }