נתונה הפעולה:

public static void What(Stack<int> st, bool flag)
{
    int x, y;
    bool found;
    Stack<int> temp1 = new Stack<int>();
    Stack<int> temp2 = new Stack<int>();
    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());
}