#include <iostream>
using namespace std;

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

    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] != target) {
            cout << "No";
            return 0;
        }
    }

    cout << "Yes";
    return 0;
}