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

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

    int A[105];
    for (int i = 0; i < N; i++) 
    {
        cin >> A[i];
    }

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

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

    cout << "Yes";
    return 0;
}