// Online C++ compiler to run C++ program online
#include <iostream>
#include <vector>
using namespace std;

int main() {
    int n;
    cin >> n;
    vector<int> v(n);
    for (auto &i : v) cin >> i;
    
    int target = v[0] + v[n-1];
    
    int i = 1, j = n-2;
    
    while(i < j) {
        if (target != v[i] + v[j]) {
            cout << "No\n";
            return 0;
        }
        i++;
        j--;
    }
    
    if ((n % 2 && 2 * v[n/2] == target) || n == 2) {
        cout << "Yes\n";
    } else cout << "No\n";
    
    return 0;
}