#include <iostream>
using namespace std;
int main(){ int S[50],n,i,nr=0; cout<<"n="; cin>>n; for (i=1;i<=n;i++) { cout<<"S["<<i<<"]="; cin>>S[i]; } for (i=1;i<=n;i++) nr++; if (nr%2==0) { for (i=n;i>=1;i--) cout<<S[i]<<","; } else { for (i=1;i<=n-1;i++) cout<<S[i]<<","; }
return 0;}