#include <iostream>
int A[100],N;
int main(){
	std::cin>>N;
	for (int i = 0; i < N; i++)std::cin>>A[i];
	for (int i = 0; i < N; i++)if(A[i]+A[N-1-i]!=A[0]+A[N-1]){std::cout<<"No\n";return 0;}
	std::cout<<"Yes\n";
	return 0;
}