QueueWithStack

class StackQueue{
    Stack<int> st1 = new Stack<int>();
    Stack<int> st2 = new Stack<int>();
    
    //Complete the functions
    public void Push(int x){
        while(st2.Count>0){
        st1.Push(st2.Pop());
        }
        st1.Push(x);
        return;
    }
    
    public int Pop(){
        while(st1.Count>0){
        st2.Push(st1.Pop());
        }
        return st2.Count>0?st2.Pop(): -1;
        
    }
    
    
}