#include<stdio.h>

int main(){
	
	int N,A[101],i;
	scanf("%d",&N);
	
	for(i=0;i<N;i++){
		scanf("%d",&A[i]);
		
	}
	for(i=0;i<N;i++){
		if((A[i]+A[N-1-i]) != A[0]+A[N-1]){
			printf("No\n");return 0;
		}
	}
	printf("Yes\n");
	
}