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

int main()
{
    int N;
    cin >> N;
    vector<int> A(N);
    for(int i = 0; i < N; i++){
        cin >> A[i];
    }
    int check = A[0] + A[N-1];
    bool flag = true;
    for(int i = 0; i < N; i++){
        if (A[i] + A[N-1-i] != check)
        {
            flag = false;
        }
    }
    if(flag) cout << "Yes" << endl;
    else cout << "No" << endl;;
}