#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define vll vector<ll>
#define vi vector<int>
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()



void solve() {
   ll n;
   cin>>n;
   vll v(n);
   for(auto &a:v) cin>>a;
   ll sm = v[0]+v.back();
   set<ll> s;
   for(int i=0;i<n;i++){
    s.insert(v[i]+v[n-i-1]);
   }    if(s.size()==1 && *s.begin()==sm)
        cout<<"Yes"<<endl;
        else
        cout<<"No"<<endl;
    
}

int main() {
    int t = 1;
    //cin>>t;
    while (t--) solve();
}