נתונה הפעולה:

public static void what(Stack<Integer> st, boolean flag)
{
    int x, y;
    boolean found;
    Stack<Integer> temp1 = new Stack<Integer>();
    Stack<Integer> temp2 = new Stack<Integer>();
    while(!st.isEmpty())
    {
        x = st.pop();
        found = false;
        while(!st.isEmpty())
        {
            y = st.pop();
            if((x > y) == flag)
                found = true;
            temp1.push(y);
        }
        while(!temp1.isEmpty())
            st.push(temp1.pop());
        if(!found)
            temp2.push(x);
    }
    while(!temp2.isEmpty())
        st.push(temp2.pop());
}