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

int main(void) {
	int N;
	cin >> N;
	
	vector<int> A(N);
	for(int i = 0; i < N; ++i) cin >> A[i];
	
	bool flag = true;
	for(int i = 0; i < N; ++i) if(A[i] + A[N - 1 - i] != A[0] + A[N - 1]) flag = false;
	
	cout << (flag ? "Yes" : "No") << "\n";
	return 0;
}