#include <bits/stdc++.h>
using namespace std;
#define int long long

int N;

signed main(){
  cin>>N;
  vector<int> A(N);
  for(int i = 0; i < N; i++) cin>>A[i];
  for(int i = 0; i < N; i++){
  	if(A[0] + A[N-1] != A[i] + A[N-i-1]){
  		cout << "No" << "\n";
  		return 0;
  	}
  }
  cout << "Yes" << "\n";
}