#include <bits/stdc++.h>

#define all(v) v.begin(), v.end()

using ll = long long;
using ull = unsigned long long;

using namespace std;

int main() {
  int n;
  cin >> n;

  vector<int> v(n);
  for (auto& e : v)
    cin >> e;

  for (int i = 0, j = n - 1; 2*i <= n; ++i, --j) {
    if (v[i] + v[j] != v.front() + v.back()) {
      cout << "No";
      return 0;
    }
  }
  cout << "Yes";

  return 0;
}