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

#define ll long long
#define vi vector<int>
#define vll vector<ll>

void solve() {
    ll N; cin >> N;
    vll a(N);
    for(int i = 0; i < N; i++) cin >> a[i];
    ll t = a[0] + a[N - 1];
    for(int i = 1; i <= (N / 2); ++i) 
        if((a[i] + a[N - 1 - i]) != t) {
            cout << "No";
            return;
        }
    cout << "Yes";
}

int main() {
    int tc = 1;
    // cin >> tc;
    while(tc--) {
        solve();
    }
    return 0;
}