#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>

using namespace std;

int main()
{
  int n;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < n; ++i) cin >> a[i];
  int ans = 1;
  for (int i = 0; i < n - 1; ++i)
  {
    if (a[i] + a[n - i - 1] != a[0] + a[n - 1]) ans = 0;
  }
  cout << (ans ? "Yes" : "No") << endl;
}