code:
<span style="font-size:18px;">#include <iostream>
#include <fstream>
using namespace std;
char data[16][26];
int num=1,n;
int main()
{
fstream in("input.txt");
while (cin >> n)
{
memset(data,'\0',sizeof(data));
if (!n)
break;
cout << "SET " <<num++<< endl;
for (int i = 1; i <= n; i++)
{
cin >> data[i];
}
for (int i = 1; i <= n; i+=2)
{
cout << data[i]<<endl;
}
for (int i = n - n % 2; i >= 1; i -= 2)
{
cout << data[i] << endl;
}
}
//system("pause");
return 0;
}
</span>