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

int main()
{
	int n; cin >> n;
	vector<int> arr(n);
	for(auto &i : arr) cin >> i;
	
	for(int i = 0; i < n; ++i)
	{
		if(arr[0]+arr[n-1] != arr[i]+arr[n-i-1]) {
			cout << "No" << endl;
			return 0;	
		}
	}	
	cout << "Yes" << endl;
	return 0;
}