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



void solve(){
    int N; cin >> N;
    vector<int> A(N);
    for(int i = 0; i < N; ++i){
        cin >> A[i];
    }
    bool ok = true;
    for(int i = 0; i < N; ++i){
        if(A[i] + A[N - i - 1] != A[0] + A[N - 1]) ok = false;
    }
    if(ok){
        cout << "Yes\n";
    }else{
        cout << "No\n";
    }
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << setprecision(10) << fixed;

    int T;
    T = 1;
    //cin >> T;
    for(;T--;) solve();
}