#include <bits/stdc++.h>
#define ll long long
#define int long long
#define double long double
#define float double
#define pb push_back
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define nl '\n'
#define here cout << "HERE" << endl;
#define forn(i, a, n) for (int i = a; i < n; i++)
#define print(a) for (auto& e : a) cout << e << " "; cout << endl;
#define MOD(a, b) (((a) % (b) + (b)) % (b))
#define yesno(b) cout << ((b) ? "YES\n" : "NO\n")
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
using vi = vector<int>;
using pii = pair<int,int>;

void solve(){
    int n;
    cin >> n;
    vi arr(n);
    forn(i,0,n) cin >> arr[i];
    int charlie=arr[0]+arr[n-1];
    forn(i,1,n-1){
        if(arr[i]+arr[n-i-1]!=charlie){
            cout<<"No"<<nl;
            return;
        }
    }
    cout<<"Yes"<<nl;
}

signed main(){
    fast
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    int t = 1;
    // cin >> t;
    for(int i=0;i<t;i++){ 
        // cout<<"Case "<<i+1<<": ";
        solve(); 
    }
    return 0;
}