#include<iostream>
#include<vector>
using namespace std;
void solve(){
int n;
cin>>n;
if(n==1){
    cout<<"Yes"<<endl;
   return;
}
vector<int>a(n);
for(int i=0;i<n;i++){
    cin>>a[i];
}
int y=a[0]+a[n-1];
for(int i=0;i<n;i++){
    int x=a[i]+a[n-i-1];
if(x!=y){
    cout<<"No"<<endl;
    return;
    
}

}
cout<<"Yes"<<endl;

}

int main(){
   
    solve();

}