// #include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
constexpr ll inf = (1LL << 61);
ll dx[8] = {0, 1, 0, -1, 1, -1, -1, 1};
ll dy[8] = {-1, 0, 1, 0, 1, 1, -1, -1};
#define rep(i, n) for (ll i = 0; i < (ll)(n); ++i)
#define REP(i, init, n) for (ll i = (ll)init; i < (ll)(n); ++i)

ll a[2 << 17];

int main() {
  //
  ll n;
  cin >> n;
  rep(i, n) cin >> a[i];
  bool ok = true;
  rep(i, n) {
    if (a[i] + a[n - 1 - i] != a[0] + a[n - 1]) ok = false;
  }
  cout << (ok ? "Yes\n" : "No\n");
}