public static void Calculate(StacksUsingArrays stack, int q) throws Exception {
//Write Your Code Here
/* Donot initialize another Scanner use the static scanner already declared*/
for(int i=0;i<q;i++)
{
int n=s.nextInt();
if(n==2)
{
int c=s.nextInt();
stack.push(c);
continue;
}
if(stack.isEmpty())
{
System.out.println();
continue;
}
int item=stack.pop();
System.out.println(item);
}
}