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

using ll = long long;
using pii = pair<int,int>;
using vi = vector<int>;

#define fastio ios::sync_with_stdio(false); cin.tie(nullptr);
#define all(x) (x).begin(), (x).end()

int main() {
    fastio;

    int n;
    cin >> n;
    vector<int> arr(n,0);
    for(auto &x:arr)cin >> x;

    int target = arr[0] + arr[n-1];
    for(int i=1;i<=n/2;i++){
      if((arr[i] + arr[n-i-1]) != target) {
        cout << "No" ;
        return 0;
      }
    }
    cout << "Yes";

    return 0;
}