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

int main() {
    int N;
    cin >> N;

    vector<int> A(N);
    for (int i = 0; i < N; i++) {
        cin >> A[i];
    }

    int target = A[0] + A[N - 1];

    for (int i = 0; i < N; i++) {
        if (A[i] + A[N - i - 1] != target) {
            cout << "No\n";
            return 0;
        }
    }

    cout << "Yes\n";
    return 0;
}